Protons
p⁺ 6
Neutrons
n⁰ 6
Electrons
e⁻ 6
Live measurements
- Atomic number
- 6.00
- Mass number
- 12.0
- Overall charge
- 0.00
- Occupied shells
- 2.00
- Outer-shell electrons
- 4.00
ChemistryGCSE8 minBeta
Atom & Ion Builder
Add protons, neutrons and electrons to build atoms, isotopes and ions, then connect each particle count to element identity, mass, charge and shell arrangement.
Model presets
Reviewed starting statesCurriculum map
- AQA GCSE Chemistry
Atomic Structure and the Periodic Table → Atoms, isotopes, ions and electron arrangements - Edexcel GCSE Chemistry
Key Concepts in Chemistry → Atomic structure and the periodic table
Model boundaries
- The shell diagram is a simplified GCSE representation rather than a quantum orbital model.
- The first 18 elements are identified by proton number; up to 20 electrons are allowed to explore simple ions.
- The model calculates composition and does not predict nuclear stability or natural abundance.
StudyVector-authored atomic-composition model using proton identity, nucleon mass and proton-minus-electron charge relationships; mapped to the curriculum topics shown below.
Accessible text description
A Bohr-style model places individually labelled protons and neutrons in a central nucleus and distributes electron dots around concentric shells. Native add and remove buttons change each particle count. The element name, nuclide notation, shell arrangement, mass number and signed charge update from the same deterministic state.