Build Atoms & Ions
Click the rings to place electrons: 2, 8, 8, 2 from the centre outwards.
? How to use
Guided
Test
1. Element
2. Target
Neutral atom
Common ion (suggested)
Custom ion…
Charge
3. Clicking a ring will…
+ Add
− Remove
4. Check
Check
Show answer
Clear
Random
How to use
Choose an
element
and a
target
(atom or ion).
Click the
glowing ring
to add an electron. Use
Remove
mode (or hold
Shift
) to take one away.
Press
Check
. Use
Show answer
only after trying.
Key
Nucleus (protons + neutrons)
Electron (e⁻)
Ring to click when adding
Ring to click when removing
Full shell
Number on a ring = electrons / maximum
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