Periodic Table – Chem

The accurate periodic table app for students and chemists

All 118 elements with data verified against IUPAC and NIST standards — plus a molar mass calculator, equation balancer, quizzes, and full offline access. No accounts. No tracking.

Download on theApp Store

Free download · iOS 15.1+ · iPhone & iPad · 30+ languages

The Chem periodic table screen showing all 118 elements as color-coded tiles by category, with search, filter, temperature and compare controls above them.
All 118 elements, color-coded by category — data verified against IUPAC and NIST.

Four screens you'll actually use

Chem is a reference tool first: tap an element for its full profile, search when you already know what you want, run the numbers, and put two elements side by side.

Magnesium element detail sheet showing the alkaline earth metal tag, block S, period 3, group 2, an animated electron shell diagram with K, L and M shell counts, and the [Ne] 3s2 electron configuration.

Every element, in full

Tap any tile for atomic mass, electron configuration with a shell diagram, melting and boiling points, density, electronegativity, ionization energy and oxidation states.

Periodic table search screen with helium typed into the search field; the helium tile is highlighted in the table while the remaining element tiles dim.

Search by name, symbol or number

Type what you remember and the matching tile lights up in place, so you keep your bearings in the table instead of landing in an isolated result page.

Tools tab showing the molar mass calculator with a formula field and quick examples such as H2O, NaCl and CaCO3, above an equation balancer with the H2 plus O2 to H2O example.

Molar mass and equation balancing

Enter any formula for its molecular weight, or paste an unbalanced equation and get the coefficients. Atomic weights follow the CIAAW (IUPAC) abridged standard values.

Compare Elements screen with oxygen versus helium, listing atomic number, atomic mass, category, block, period and group for each in two columns.

Compare two elements at once

Put oxygen next to helium — or any pair — and read basic information and physical properties row by row instead of flipping between two pages.

Wrong data costs you marks. Chem fixes that.

Many periodic table apps ship outdated or incorrect values — even swapped boiling and melting points. When you are checking a property mid-problem-set or mid-experiment, you need numbers you can trust.

The problem with most element apps

  • Outdated or incorrect property values
  • Boiling and melting points swapped for some elements
  • Cluttered interfaces built around ads
  • Accounts and tracking you never asked for

How Chem is different

  • Every property verified against IUPAC and NIST standards
  • Clean, modern interface with no distractions
  • All element data available offline
  • Favorites, notes, and collections stored locally — no accounts, no tracking

Everything you need for chemistry class and lab

From quick property lookups to homework tools, all features below come straight from the app's App Store listing.

Complete element data

Atomic mass, electron configuration, melting and boiling points, density, electronegativity, ionization energy, and oxidation states for all 118 elements.

Molar mass calculator

Enter any chemical formula to instantly calculate its molecular weight — no manual summing of atomic masses.

Premium

Equation balancer

Balance chemical equations automatically and check your homework answers in seconds.

Premium

Temperature slider

Drag from 0 K to 6000 K and watch elements change state — solid, liquid, gas — in real time.

Quizzes & flashcards

Multiple quiz modes and flashcards to drill symbols, names, and properties until they stick.

Premium

Favorites, collections & notes

Save the elements you use most, group them into custom collections, and attach personal notes to any element.

Dark & light themes

A clean, focused interface that follows your system appearance automatically.

Offline & private

All element data works offline. Your notes and collections stay on your device — no accounts required, no tracking.

How Chem fits into your study routine

Built for students and chemistry professionals who need reliable data at their fingertips.

  1. Look up any element in seconds

    Open the table and pull detailed, IUPAC/NIST-verified properties for any of the 118 elements — even with no internet connection.

  2. Speed through stoichiometry homework

    Use the molar mass calculator for any formula and the equation balancer to verify your balanced equations before you submit.

  3. Build intuition with the temperature slider

    See which elements are solid, liquid, or gas at any temperature from 0 K to 6000 K — states of matter become visual instead of abstract.

  4. Test yourself before the exam

    Switch to quizzes and flashcards to drill what you have learned, and keep your trouble elements in a custom collection with your own notes.

Frequently asked questions

Chemistry study guides

Free, evergreen explainers written for students — the same topics the app helps you practice.

How to read the periodic table

Groups, periods, blocks, and the trends that make the table predictable.

How to calculate molar mass

A step-by-step method with worked examples, from NaCl to hydrates.

How to balance chemical equations

The inspection method, common pitfalls, and practice strategies.

Electron configuration explained

Orbitals, the Aufbau principle, and shortcuts for writing configurations.

How to memorize the periodic table

Spaced repetition, chunking, and quiz techniques that actually work.

Reliable chemistry data, right in your pocket

Download Periodic Table – Chem free on the App Store. Data verified against IUPAC and NIST. Offline. Private. Built for focus.

Get the app free