2.2 THE DEVELOPMENT OF THE ATOMIC MODEL

• Name the subatomic particles that are found in an atom.

  • proton
  • neutron
  • electron
• Proton

  Symbol: p

  Relative charge: +1

  Relative mass: 1
• Neutron

  Symbol: n

  Relative charge: 0

  Relative mass: 1
• Electron

  Symbol: e

  Relative charge: -1

  Relative mass: 1/1840
• How is the mass of a subatomic particle determined?

  the sum of the protons and neutrons in the atom.
• How are the relative charge and relative mass of subatomic particles determined?

  determined through various experimental techniques in particle physics