Atoms & Molecules

• mass no. = proton no. + neutron no.

  (nucleon)
• neutron no. = nucleon no. - proton no.
• Proton.

  • Location = In the nucleus.
  • Mass = 1
  • Charge = +1
• Neutron.

  • Location = In the nucleus.
  • Mass = 1
  • Charge = 0
• Electron.

  • Location = At the electron shell.
  • Mass = 1/1840
  • Charge = -1