Build an Atom Workshop

Click the model atom to enter the workshop. Build atoms from protons, neutrons and electrons.

START

First 20 elements

Click an element card. Atomic mass is at the top; atomic number is at the bottom.

Hydrogen

Enter the numbers of protons, neutrons and electrons. When correct, the particles fly across and build the atom.

Build checklist

ProtonsNeutronsElectrons

Use atomic number and mass number to work out the particles.

Atom complete. The nucleus has formed and the electrons are arranged in shells.

Ion / isotope workshop

After building, try changing neutrons or electrons. Changing protons is blocked because it would make a different element.

Protons

Neutrons

Electrons

Build a neutral atom first, then experiment.

Particle store

Atom builder

Term