Atoms

    Cards (6)

    • An atom has a small positively charged nucleus surrounded by orbiting negatively charged electrons.
    • Atoms have a radius of about 1 x 10-10 metres.
    • Protons have a charge of +1 and a relative atomic mass of 1. The proton number is the amount of protons the atom has.
    • Electrons have a charge of -1 and a relative atomic mass of 1/2000. The number of electrons is the same as the number of protons.
    • Neutrons have no charge or 0, and have a relative atomic mass of 1.
    • Sub shells are made up of orbitals.
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