Divendres passat vaig poder assistir a una de les sessions del Seminari Permanent de Física i Química (SPFQ) que cada any organitzen els companys i companyes del Centre de Documentació i Experimentació en Ciències (CDEC) de Catalunya. En la primera part, el professor José Martínez Gázquez, de la UAB ens va parlar de Los árabes y el paso de la ciencia griega al occidente medieval.

La segona part de la jornada va estar dedicada a les aplicacions (app) de física i de química per a tabletes i telèfons intel·ligents i la seva utilitat per l’estudi i, sobre tot, l’experimentació. Joan Cormines i Fina Guitart van presentar majoritàriament aplicacions per la química i Tavi Caselles i jo mateix apps encaminades més aviat a l’experimentació en física.

Resulta que Emilio Llorente ja havia presentat algunes altres apps en una sessió del seminari que es va fer després de Nadal relacionada amb les joguines que havien portat els reis, així que m’he pres la llibertat de replegar totes les propostes que entre uns i altres varem fer i relacionar-les a continuació.

Molts dels programes llistats són gratuïts o tenen una versió gratuïta, encara que alguns no, i s’indica el seu preu. N’hi ha molts i, per tant, la relació no és exhaustiva, encara que prou representativa. Les apps que es llisten són pel sistema Android, que és el més comú en les tabletes, encara que hi ha d’aplicacions similars per altres sistemes operatius en les seves botigues

Les apps treuen partit de les funcionalitats generals de les tabletes i telèfons, com són les de presentar informació visual i/o acústica, processar-la o calcular i, sobre tot, dels sensors que incorporen els aparells, el que fa que permeten mesurar diverses magnituds, com són la intensitat del camp magnètic, la declinació i inclinació magnètica (brúixola), distàncies i angles, angles d’inclinació, les vibracions (sismògraf), les acceleracions de l’aparell i de la gravetat, el nivell d’intensitat sonora (sonòmetre), la freqüència dels sons, la radiació gamma (comptador geiger), etc., en funció dels sensors de que disposi la tableta o el telèfon.

Segurament la sensibilitat i la fiabilitat d’alguns dels sensors sigui baixa, però per fer unes mesures aproximades són un bon instrument. A més són els sensors més barats del mercat ja que venen de sèrie en els telèfons intel·ligents i estan a l’abast de bona part de l’alumnat.

He fet una classificació en funció del camp científic en el que són d’aplicació, encara que algunes poden utilitzar-se en diferents camps, o són de caràcter general i engloben varis, però m’ha semblat que aquesta presentació pot ser més útil que llistar-les en ordre alfabètic.

En cada cas indico possibles utilitats de l’app o experiències a realitzar amb els sensors de l’aparell. També afegeixo la descripció de l’app que fan els autors, que gairebé sempre està en anglès, ja que m’ha fet molta mandra el traduir-les.

Aplicacions de caràcter general per la física

Què permeten fer

Són aplicacions que accedeixen a tot els sensors que te l’aparell i permeten fer mesures directes amb tots ells. Unes apps, com l’Androsensor, monitoritzen els diversos sensors i mesuren simultàniament: localització, luxímetre, camp magnètic, orientació, proximitat, sonòmetre. Unes altres, com l’Smart Tools, són un conjunt d’apps cadascuna amb una utilitat.

AndroSensor

AndroSensor is the absolute all-in-one diagnostic tool that lets you know virtually everything about your device’s status.

AndroSensor supports all the sensors an android device can have and it will tell you which of them are not supported by your hardware.

View in a single screen the data from all device’s sensors in real time. Graphical and text output available for each sensor (graphical output not available for proximity, location and battery info)

– location, location provider, accuracy, altitude and speed

– Google maps to show the above info. Tapping on your location shows your address, postal code and location accuracy (if available)

– accelerometer readings,

– gyroscope readings,

– light sensor value,

– ambient magnetic field values,

– device orientation

– proximity sensor readings

– pressure sensor (barometer)

– temperature readings

– battery status, voltage, temperature and health

– sound level meter (decibel)

– If your device supports it, next to the sensor’s name, you will see how much power the sensor consumes per hour in mA.

AndroSensor Log Collector

This app is a patch for AndroSensor . It is not a standalone app and it does not run alone. It only works with AndroSensor version 1.9.3 and later. “AndroSensor Log Collector” is an addon for AndroSensor. It enables the LogView feature in AndroSensor.

To use, open AndroSensor, press MENU and select Logs.

LogView prints out the last ~150 lines of the device system log file, as in logcat.

It also provides and option to save the log in your external memory/SD card, or even mail it as an attachment to anyone you wish.

Saving or mailing the log will give you access to the full log file (usually more than 4K lines).

The LogView requires READ_LOGS permission which is under “Personal Information” category. This is not looking to get your personal info. It’s just that the read logs permission is in the general category of “Personal Information” permissions.

This patch contains the required permission and the code to show the log file in AndroSensor. It doesn’t do anything if you don’t have AndroSensor installed.

Smart Tools

Smart Tools is a complete package of 5 app sets. It includes 5 Pro sets for a total of 15 tools. In a word, All-in-One.

Set 1: Length, Angle, Slope, Level, Thread – Smart Ruler Pro

Set 2: Distance, Height, Width, Area – Smart Measure Pro

Set 3: Compass, Metal detector, GPS – Smart Compass Pro

Set 4: Sound level meter, Vibrometer – Sound Meter Pro

Set 5: Flashlight, Magnifier – Smart Light Pro

Mecànica

Què permeten fer

Mesurar l’acceleració lineal, centrípeta, etc de la tableta o el telèfon amb les aplicacions d’acceleròmetre. Tant Accelerometer monitor, com Physics toolbox accelerometer o MiLAB for Android permeten guardar les dades per exportar-les i analitzar-les en un programa d’anàlisi de dades i gràfics, com SciDavis.

MiLAB for Android és de la casa Fourier (la mateixa del Multilog i Multilab) i és una primera versió que només permet mesura l’acceleració, però que és possible que s’ampliï i millori en un futur.

El sensor d’acceleració de la tableta també es por utilitzar per detectar qualsevol vibració indicant el seu valor segons una escala de perillositat amb el Vibrómetro, per exemple

La combinació de diferents sensors també permeten mesurar distàncies i altures (Smart Measure, d’Smart Tools).

Accelerometer monitor

Dispositivos Android tiene un sensor acelerómetro. Es un sensor sensible que informa de las vibraciones del dispositivo. Esta herramienta es una herramienta poderosa medidor de vibraciones.

Tiene las siguientes características:

Programas de vibraciones en tiempo real

Guarda los datos de vibración en la tarjeta SD (archivo zip * también es compatible)

Proporciona sonido de alarma configurable que puede utilizarse para:

Detectar los terremotos cuando usted duerme

Detectar si alguien abre la puerta cuando se duerme

Physics toolbox accelerometer

This app measures and displays a graph of G-Force vs Time(s) that can be exported in an e-mail as a .txt attachment with comma separated values(csv). G-Force and acceleration measured in the x, y, and z dimensions are displayed separately on the graph, and the total vector sum is displayed digitally.

android.permission.WAKE_LOCK: Used to keep the device awake only when recording accelerometer data to csv. (Example: After pushing the record button, the app will continue to collect data even when placed in a pocket during a roller coaster ride, and will turn off only after data recording has been stopped.)

android.permission.WRITE_EXTERNAL_STORAGE: A csv file is created and modified on the phone’s internal memory.

MiLAB for Android

MiLAB™, Fourier Education’s mobile app for Android devices, is based on Fourier’s award-winning MultiLab™ data analysis software.

Together with the NOVA AIR™ Bluetooth® enabled data logger, MiLAB unlocks a world of scientific experiments for teachers and students alike.

Vibrómetro

Vibration Meter es la parte 4 del paquete Smart Tools (Sismógrafo, sismómetro, temblor del cuerpo). Con esta aplicación puedes medir la vibración del teléfono o un terremoto usando los sensores del teléfono, mostrando una referencia, como en un detector sísmico.

Los valores medidos se rigen por la escala de Intensidad de Mercalli Modificada (MMI). Si la medición no es precisa puedes calibrarla de forma de que el valor máximo esté sobre 10-11.

Smart Measure

Smart Measure es parte del paquete Smart Tools (Distancia, Altura).

Con esta aplicación puedes medir la distancia, la altura y el ancho de un objeto mediante trigonometría con tu teléfono.

Su uso es muy simple: simplemente levántate y pulsa el obturador. Un punto importante es dirigir la cámara al suelo, NO al objeto. (p.e. Para medir la distancia a alguien, apunta a sus zapatos )

Ones i vibracions

Experiències de so

Què permeten fer

Mesurar la freqüència d’un so o una nota musical amb les apps SpecScope, Spectrum Analyzer, bs-spectrum free i DaTuner. DatunerLite funciona molt bé amb freqüències baixes, diu la nota musical, el valor de la seva freqüència i el nivell de dB.

Mesurar la freqüència de ressonància de qualsevol cavitat i aprofitar per mesurar de la velocitat del so amb un tub d’assaig o una flauta dolça (SpecScope, Spectrum Analyzer, bs-spectrum free i DaTuner).

Mesurar els umbrals d’audició amb un altaveu i les apps Signal Generator o FuncGen, actuant de generadores de funcions. Signal Generator o FuncGen són generadors de funcions amb un rang de freqüències de l’àmbit de l’oïda humana. La sortida dels auriculars permet fer un ús individual o bé si es connecten a uns altaveus amb amplificador incorporat es pot fer simultàniament per a tota la classe. Es pot fer un escombratge de freqüències altes (fins a 20000Hz) i detectar així com augmenta la insensibilitat a les freqüències altes del professorat amb l’edat, mentre es manté inalterable any a any la de l’alumnat.

Mesurar el nivel d’intensitat sonora amb el Noise Meter que fa de sonòmetre donant els dB i fent mitjanes cada 10 segons.

Produir ressonàncies en tubs interferències constructives i destructives amb dos altaveus i les apps Signal Generator o FuncGen signal generator.

Produir un so d’una freqüència determinada per mostrar l’efecte Doppler. La variació de freqüència es pot mesurar amb un altre aparell.

Spectrum Analyzer

Spectrum Analyze gives you real-time spectrum data from the audio data. A great way to analyze sound from you Android device.

Features in Free Version: No Ads, 44100 Hz sampling rate, 8192 samples per spectrum, ~5.4 Hz Resolution per point, Peak Detect of whole spectrum and your local window, Pinch to Zoom, Tap to Pause, Max Hold, Take Screenshot.

bs-spectrum free

This application calculates FFT (Fast Fourier Transform) of the sound which is recorded by your Android device’s internal mic. The calculated data is displayed as graph.

Additionally, Following functions included. – Displaying peak amplitude and frequency- Storing snapshot and comparing with real-time waveforms

SpecScope
0,79 €

SpecScope is a spectrum analyzer and is the second in the line of engineer applications from NFX Development. The SpecScope incorporates the speed and ease of use to access FFT frequency measurements in a hurry.

The UI maximizes the size of the screen, using gesture control to navigate around the graph measurement.

– Logarithmic/Linear measurements

– Pinch to zoom in both X and Y axis

– Simply navigate round the graph by dragging

– Selectable No. bin for accuracy versus speed

– Three settings of spectrum averaging

– Four different windowing options

– Threshold trigger to hold the peak value

– Tap to pause and resume measurements (graph is still navigational in this mode)

– A adjustable sample rate allow analysis from 10 Hz to 22KHz

– Optional measurement markers for ease of reading

DaTuner

DaTuner (Lite) is an all-purpose, precise and responsive chromatic tuner app for android with a simple interface.

DaTuner Pro was recently reviewed by Android Central: “For the Android-loving musician, I think DaTuner Pro is easily the best tuner you can have on your device. I used to give that title to *see review!*, but DaTuner has proven to be so powerful, easy to use, and accurate, it’d be foolish to not use it.”

DaTuner converts the fundamental frequency to the nearest note and error in cents for quick and easy tuning of your guitar, ukelele, violin, bass, cello, mandolin, piano, harp, saxophone, Ducati timing belt, harmonica, kazoo, you name it.

Noise Meter

Noise Meter measure the volume of sounds using your ANDROID. Support the digital filter. You can see the filter curve. Feature:

1. Background measurements.

2. Show average, LAeq, min, max and peak dB

3. User define update rate

4. High and Low alarm

5. dB(A), Low, High, Band pass filter.

6. Shows the filter curve.

7. Keep screen

8. Logging and log viewer

Signal Generator

Easy to use audio signal generator that creates white and pink noise as well as sine waves.

Test the bandwidth of your phone’s speaker (or your ears…), create true uncorrelated noise.

FuncGen signal generator

The Crescendo Systems function generator can be used to generate sine, triangle, square and non repeating noise signals.

Additionally these carrier signals can be AM, FM or PM modulated or swept in frequency. The modulations can be enabled on their own or in any combination.

The square and triangle signals have a duty-cycle that can be set from 1% to 99%.

The ArbGen app adds frequency resolutions below 1Hz, automatic and customized saving of all parameters and the arbitrary function generator.

Electromagnetisme

Mesura del camp magnètic

Què permeten fer

Utilització del mòbil o la tableta com a brúixola (Brúixola d’Smart tools o Compass/Brújula) per comprovar que qualsevol objecte d’acer està magnetitzat (un radiador, per exemple).

Mesurar el camp magnètic terrestre (EMF sensor free), la declinació i la inclinació magnètica.

Mesurar a diferents distàncies la intensitat del camp magnètic creat per un imant (EMF sensor free, Andro sensor). Es pot comparar amb els valors obtinguts per una sonda de camp magnètic (Multilog). L’EMF Entity Sensor mesura el valor del camp magnètic en les tres direccions de l’espai i dóna el valor del mòdul.

Detectar metalls utilitzant les variacions del camp magnètic (Metal detector).

Compass/Brújula

Compass view with location display and geo-tagged notes lets you not only steer in the right direction, but view maps and keep notes of the places you visit.

• Save your favorite places (home, work place, school, restaurant, shops, etc.) or even your car location. Navigate back to them later with Google Navigation.

• Capture and view your location-based notes in your area using the free Catch app.

EMF Sensor Free

Use the magnetic field sensor on your phone to take EMF readings. Works like a 3 axis EMF meter. Displays EMF in milli Gauss (mG) or micro Tesla (uT). Uses include ghost hunting, paranormal research, finding sources of EMF radiation, monitoring EMF levels, and/or curiosity. Instructions for use:

Preferences can be found by pressing the menu button. Many display options are available to customize what is on the screen.

The range on the meter can be changed in the options or by sliding your finger up or down on the screen. The left side of the screen adjusts the minimum, the right side adjusts the maximum. You can lock or unlock touch adjustments through the menu.

Custom color values can be set for the text. Sound can be enabled and customized in preferences, default is off. This will play a tone at a rate determined by the EMF reading, similar to a Geiger counter.

Metal Detector

Metal Detector is in the 3rd set of the Smart Tools collection.

This app measures magnetic field values using the magnetic sensor that is built into the phone. The magnetic field level (EMF) in nature is about 49μT(microtesla) or 490mG(milligauss); 1μT = 10mG. If there is any metal in the area, the strength of the magnetic field should increase. Among other uses, it can be helpful in finding electrical wires in walls and metal in the ground.

Usage is simple: Open this app on your device, and move it around; The magnetic field values will constantly fluctuate.

The accuracy depends entirely on the sensors in your device. Note that the magnetic sensor is affected by electronic equipment (TVs, PCs, etc.) due to electromagnetic waves. This is not a bug in the app.

Metal Sniffer / Metal Detector

This app detects nearby electromagnetic fields using the phone’s built-in magnetometer /compass. Depending on your phone, you can use it to detect metals up to 15cm away, and magnets from far, far away! Note that household equipment like TVs, and computers or even your phone case can affect readings.

Move the app around and read the measurements, if the magnetic field readings go over a critical level, the phone will vibrate, meaning a ferromagnetic material is nearby.

Mesura de radiacions electromagnètiques

Què permet fer

Detectar qualitativament, tant gràficament com de forma sonora l’existència de radiacions, per exemple de microones, indicant el nivell de perillositat. Si es posa davant de la porta d’un microones en funcionament el sensor de EMP detecta un fort increment i t’aconsella que et retiris del lloc.

EMP Detector

EMP Detector is using the sensor of smartphone to find electromagnetic wave. Especially, it analyzes wavelength of magnetism sensor to the way of originative algorithm.

I recommend that you check operation test nearby microwaves or other electronic equipments.

Física moderna

Mesura de la radiació gamma

Què permeten fer

Mesurar la radiació gamma natural (o de qualsevol font radioactiva de que es disposi) amb la càmera del mòbil i l’app Radioactivity Counter. Comparar els valors obtinguts amb el donats amb un aparell comptador geiger tradicional o les dades per la localitat del Consejo de seguridad nuclear.

GammaPixLite també és un detector de radiació gamma que adverteix que no dóna valors exactes, però sí serveix per a detectar-la. És lent en fer la mesura.

Ull!. La majoria d’apps que diuen mesurar la radioactivitat són simples joguines i no mesuren res.

Radioactivity Counter
1,99 -3,49 €

This is a real working radioactivity counter. You only need a BLACK TAPE to cover the lenses !!

Disclaimer: The type of radiation picked up by the camera can be dangerous/detrimental to the user’s health as well as cause damage to the device.

Its NOT a JOKE! The App is using the camera sensor to detect radiation, like a geiger mueller counter, of course with a smaller area. We tested several mobile phones at the Helmholtz research facility in Munich, using a professional radiation device in the range of 2-10 µGy/h till 1-10 Gy/h (CS137 and CO60). The CMOS sensors can detect primary gamma radiation and some higher beta radiation (depends on the shieldings in the mobile phone). Typically not going into saturation as most GM tubes.

GammaPixLite

The GammaPix(TM) Lite App, developed initially for several federal agencies, turns your phone into a detector of ionizing radiation. This isn’t one of those fake Geiger counters. The GammaPix technology has been successfully tested at independent labs with calibrated sources.

A 20-minute initialization is required before you use the application for the first time. We know this step slows you down, but it really is necessary to get the best results. Please perform this step in a place you know is likely to be free of excessive radioactivity.

For best results make sure no light is getting into the camera when you run the GammaPix Lite app. Putting the phone in your pocket or covering it with a book works well. A reading takes about 5 minutes if there’s no danger. Dangerous levels will be reported sooner.

Simuladors

Simulador de circuits elèctrics

Què permet fer

Dissenyar circuits, calcular els valors de les magnituds elèctriques i comprovar les solucions.

EveryCircuit free

All joking aside, this time you will understand how electronic circuits work.

Build any circuit, tap play button, and watch dynamic voltage, current, and charge animations. This gives you insight into circuit operation like no equation does. While simulation is running, adjust circuit parameters with analog knob, and the circuit responds to your actions in real time. You can even generate an arbitrary input signal with your finger!

That’s interactivity and innovation you can’t find in best SPICE tools for PC like Multisim, LTspice, OrCad or PSpice (trademarks belong to their respective owners).

EveryCircuit is not just an eye candy. Under the hood it packs custom-built simulation engine optimized for interactive mobile use, serious numerical methods, and realistic device models. In short, Ohm’s law, Kirchhoff’s current and voltage laws, nonlinear semiconductor device equations, and all the good stuff is there.

Growing library of components gives you freedom to design any analog or digital circuit from a simple voltage divider to transistor-level masterpiece.

Simulador del col·lisionador del CERN

Què permet fer

L’app LH See del CERN és un simulador que permet visitar les seves instal·lacions i fer alguns dels experiments que allí realitzen.

LHSee – CERN

Want to find out how to Hunt the Higgs Boson using your phone? Ever wondered how the Large Hadron Collider experiments work, and what the collisions look like?

Scientists at the world’s biggest scientific experiment – the Large Hadron Collider at CERN, Geneva – are trying to answer fundamental questions about the nature of the universe, the origin of mass, and structure of space and time. LHSee makes the Hadron Collider accessible to anybody with an Android smartphone or tablet PC. Written by Oxford University scientists in collaboration with the ATLAS experiment at CERN, it is designed for use by experts and non-experts alike.

For the first time you can now grab live collision events from the underground detectors in Geneva, and beam them direct to your own device. As well as a variety of educational resources, the application allows you to interact with the collision events in full 3D graphics. You can also find out how the different parts of the detector work, learn how to identify different types of collision, and even put your new skills to the test by playing the “Hunt the Higgs” game.

Simulador de nònius

Què permet fer

Aprendre a utilitzar un nònius o peu de rei.

Vernier Caliper Simulator

Ever wanted to practice reading a vernier caliper but didn’t have a set? No worries, now you can practice on any Android device using this free and easy app. Just slide your finger across to grip the red object and take your reading. Enter your guess and press “Check My Answer” to see if you got it right.

If you ever need help, press the “Teach Me” button and the correct scale lines to read will be highlighted by red arrows.

Astronomia

Què permeten fer

És un planisferi celeste que s’orienta en el cel seguint l’orientació del mòbil, aprofitant el GPS i el sensor de camp magnètic.

Google Sky Map

This practical app lets you pinpoint the exact location of the stars, planets and other celestial objects in the night sky. Simply point your phone at the sky and you’ll see details of exactly what’s up there represented by a map in Google Sky Map.

As you move your phone around, the map moves with you to show what part of the Universe you’re pointed at. It does this using GPS, the internal compass, and the current date and time. Google Sky Map also has a manual mode that lets you explore the map with your finger rather than it auto-detecting the data based on where you’re pointing your phone.

Aplicacions de caràcter general per la Química

Què permeten fer

Aporten només informació, com el W Chemistry handbook, o informació i utilitats per fer càlculs de composició en percentatge en massa o en molaritat, per exemple, en el cas del Chemistry helper.

Chemistry helper

A simple app designed as a quick reference for chemistry students. Includes a periodic table with links to wikipedia, a tool to calculate molecular masses of compounds (with a button at the top to perform simple grams/moles calculations, calculate mass percents and do stoichiometry with that compound), a table of polyatomic ions, constants, solubility rules, tools for calculating molarity and volume of solutions, tools for converting between units commonly used in chemistry, compound lookup that links to major chemical search engines (and wikipedia, of course), a table of reduction potentials, organic chemistry functional groups, IR, H1 NMR and C13 NMR spectroscopy tables and a table with common ligands.

W Chemistry handbook

Do you often have to look up things like…

… the boiling point of toluene,

… the molecular weight of phosphoric acid,

… the atomic weight of gold,

… the isoelectric point of phenylalanine,

… the addiction potential of caffeine,

… or any other property of chemicals, elements or biomolecules?

Constructors i visualitzadors de molècules

Què permeten fer

Visualitzar molècules de llibreries de les aplicacions o importades. També permeten dibuixar-les un mateix.

ChemDoodle Mobile

ChemDoodle^® Mobile is accessed with your ChemDoodle account that is provided to you for free when you purchase ChemDoodle desktop. You can use the Guest account to access this app without purchasing ChemDoodle, but you will not be able to save your drawings.

ChemDoodle Mobile is the Android companion to the popular chemical publishing desktop application, ChemDoodle. ChemDoodle Mobile is a calculator for drawn organic structures. There are four main windows: Draw, Calculate, Spectra and Help. The Draw window shows a typical ChemDoodle sketcher, where you can draw and store your structures and molecules. The Calculate page calculates properties and the Spectra page simulates NMR spectra. All spectra are interactive. The Help page contains a thorough help guide.

MolPad

MolPad is a chemical structure drawing application for the Android platform. You can draw structures from scratch or load them from ChemSpider and modify them. Structures can be emailed in Molfile format

Atomdroid

The Atomdroid app is a computational chemistry tool for the Android platform. It can be used as a molecular viewer/builder and contains local optimization and Monte Carlo simulation features. Install now and experience mobile computational chemistry!

List of features:

* molecular viewing (compatible with xyz and pdb files)

* trajectory analysis and viewing

* molecular building (export to xyz)

* PDB downloader (requires the Internet permission, downloads compressed pdb to save on your data plan)

* Atomdroid molecular libraries (requires the Internet permission)

* local optimization (L-BFGS and Powell algorithms)

* Monte Carlo simulation and analysis

* Global optimization using a Monte Carlo with minimizations approach

* Universal Force Field (UFF) implementation (currently without electrostatics)

* communication with other Atomdroid users via bluetooth and share your molecules (requires bluetooth permission, we are VERY cautious with using it)

Molecule Viewer 3D

Chemicals built in include:

* Both D and L amino acids

* D carbohydrates

* Many cyclic sugars

* Common cofactors

* DNA nucleobases, pairs and strands and many other common molecules

Chemicals can also be searched and downloaded directly from the ChemDB and PDBeChem websites.

Calculadores químiques

Què permeten fer

Es poden igualar equacions químiques i fer càlculs estequiomètrics

Chemistry Mobile Free

Chemistry Mobile (ChemMobile) is an app designed to help chemistry students. It is perfect for any elementary chemistry courses.

It has chemical calculator able to balance chemical equations of various difficulties. It also has a built in periodic table and can perform stoichiometry. Chemistry students might also find the list of formulas and polyatomic ions useful. Finally, it has has a formula evaluator for the gas laws, and a molar mass calculator, with useful conversions.

-Balance chemical equations

-Perform stoichiometric calculations

-Evaluate gas laws

-Periodic Table

-Chart of Polyatomic ions

-Activity series

-Molar Mass Calculator

-List of formulas

-Solubility Rules

Chemical Equation Balancer

This chemical equation balancing application will balance all types of equations in a fraction of a second.

This application operates offline, without the use of the Internet, by solely using mathematical algorithms to find coefficients of compounds.

Taules periòdiques

Què permeten fer

A porten informació sobre els elements de la taula periòdica.

Periodic Droid

The most complete, customizable, Chemistry Periodic Table of Elements available for your Android.