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Proton vs Neutron

Protons and neutrons both live in the nucleus, but only one carries charge and determines an atom's identity.

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Proton
  • Carries a positive electric charge
  • Number defines the element (atomic number)
  • Mass about 1 atomic mass unit
  • Found in the nucleus
  • Determines chemical identity
Neutron
  • Has no electric charge (neutral)
  • Number can vary, creating isotopes
  • Mass about 1 atomic mass unit
  • Found in the nucleus
  • Adds mass and nuclear stability

Verdict

Protons set an atom's identity and charge, while neutrons add mass and stabilize the nucleus. Changing protons changes the element; changing neutrons changes the isotope.

Frequently asked

Which particle defines the element?+

The proton, since the number of protons equals the atomic number.

What happens if neutron count changes?+

The atom becomes a different isotope of the same element.

Do both have a charge?+

No. Protons are positive, but neutrons carry no charge.

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