Class 12 Physics simulations · Nuclei

Size and density of nuclei

Build nuclei of increasing mass number. The radius grows as A^(1/3), so the density stays the same.

Open the simulation

What to notice

All nuclei have roughly the same density — about 2.3 × 10¹⁷ kg/m³.

Key relation

R = R₀ A^(1/3), R₀ ≈ 1.2 fm

Try this

Compare A = 27 with A = 216. How do their radii compare?

What you can change

• Mass number A: 1 to 240
• Proton fraction: 0.35 to 0.5

More in Nuclei

• Activity of a radioactive sample
• Alpha decay and nuclear recoil
• Binding energy per nucleon
• Neutron multiplication in fission
• Energy from nuclear fusion
• Mass defect and binding energy
• Radioactive decay
• Radiometric dating

See all Class 12 Physics simulations or every Physica simulation.