Chemistry C4

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Atomic Structure

Atoms

  • The nucleus of an atom is made up of protons and neutrons
  • Electron : Relative charge = -1. Relative mass = 0
  • Proton : Relative charge = +1. Relative mass = 1
  • Neutron: Relative charge = 0. Relative mass = 1
  • An atom is neutral because it has an equal number of electrons and protons. The positive charges balance out the nagative charges

Isotopes

  • Elements with the same atomic number

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