⚛️ Atom Builder

Add electrons to the rings to build an atom. Light up the first 36 elements all the way to Krypton — then keep going to Xenon (54) for extra!

Live atom
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Electron configuration
empty
0 electrons
Ring 1 max 2 Ring 2 max 8 Ring 3 max 18 Ring 4 max 18 Ring 5 max 8

Click a ring to add an electron to it. Click an electron to remove it. Fill the rings in the right pattern to match a real element!

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Add electrons to match this element.
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Core: up to Krypton (1–36) Bonus: 37–54 Your match Other elements
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Build an atom to discover an element.
Its description and real-world uses will appear here.
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Write about your element

Build an atom above, then let's think and write about how we use it today.

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