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The Elements: A Guide to the Periodic Table, a free science course on Tomo

The Elements: A Guide to the Periodic Table

Like Duolingo, but for The Elements: A Guide to the Periodic Table. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.

For the part of you with thirty open tabs that never became anything.

A deep dive: 41 levels across 6 sections, about 82 minutes end to end, roughly 16 days at five minutes a day. It moves through The Elements Around You, The Reactive and the Reliable, The Heavy Lifters, The Building Blocks of Tech, The Rare and the Radioactive, and The Hidden Logic of the Grid. It starts from scratch.

41 bite-size levelsAbout 5 minutes each

Free forever · No credit card · iPhone & Android

Ellie the Element, the guide who teaches the The Elements: A Guide to the Periodic Table course
The Elements: A Guide to the Periodic Table
with Ellie the Element
41
Levels
6
Sections
5
Min/day
What you'll learn

Key ideas in The Elements: A Guide to the Periodic Table

  • Hydrogen is the most abundant element in the universe
  • Helium is produced through the fusion of hydrogen in stars
  • Hydrogen consists of just one proton and one electron
  • Helium is a noble gas and does not form chemical bonds
  • Stars use hydrogen as their primary fuel source
  • Helium is chemically stable and non-flammable
  • Hydrogen's role as the primary building block of the universe
  • Helium's chemical inertness and origin
  • Hydrogen can lose an electron like an alkali metal
  • Hydrogen can share electrons like a non-metal
  • Hydrogen's unique electron shell allows it to mimic different groups
  • Hydrogen is the lightest and least dense element
  • Helium is the second lightest element
  • Air is a mixture of heavier gases like Nitrogen and Oxygen
  • Hydrogen's dual chemical nature
  • The relationship between gas density and lifting power
Why not just Google it

You've tried the other tabs

Wikipedia

Thirty open tabs. Four facts you actually kept.

YouTube

You watched. You nodded. By Sunday it was gone.

ChatGPT

One answer, then back to scrolling.

Online courses

Eight weeks. You meant to finish. You didn't.

Tomo gives The Elements: A Guide to the Periodic Table the Duolingo treatment: levels, streaks, and quick quizzes that test what you just learned. That game loop is what the tabs above never had, so it's the one you actually finish.

Try a question

Here's what playing it feels like

A real question from this course. Take your best guess.

The Universe's First Ingredients

If you were to count every single atom in the entire universe, which element would you find more than any other?

Get it right to open this lesson and 40 more in the app.

Course map

Where The Elements: A Guide to the Periodic Table takes you

Journey through the building blocks of the universe, from the air you breathe to the rare metals in your smartphone. Discover the unique personalities and hidden powers of every chemical family.

  1. 1

    The Elements Around You

    • Hydrogen and Helium: The Cosmic Starters
    • Carbon, Oxygen, and Nitrogen: The Life Givers
  2. 2

    The Reactive and the Reliable

    • The Alkali Metals: Explosive Personalities
    • The Noble Gases: The Loners of the Table
  3. 3

    The Heavy Lifters

    • Iron, Copper, and Gold: Metals of Civilization
    • Mercury and the Liquid Metals
  4. 4

    The Building Blocks of Tech

    • The Halogens: The Salt Makers
    • Silicon and the Metalloids: The Bridge
    • Phosphorus and Sulfur: The Smelly Essentials
  5. 5

    The Rare and the Radioactive

    • The Lanthanides: Rare Earths in Your Pocket
    • Uranium and the Actinides: Nuclear Power
  6. 6

    The Hidden Logic of the Grid

    • Atomic Number and the Identity of Matter
    • Periods, Groups, and Trends
    • Electron Shells: The Driver of Chemistry

6 sections · 14 units · 41 levels. Built to play, not to enroll.

How it's taught

You pick the voice

This course
The Professor

The Elements: A Guide to the Periodic Table is taught in the The Professor style: clear, structured, thorough. Want a different feel? In the app you can spin up the same topic in any of Tomo's teaching styles. Same facts, totally different vibe.

Start free

Start The Elements: A Guide to the Periodic Table today.

Download Tomo, search The Elements: A Guide to the Periodic Table, and play your first lesson in under a minute.