The Atom

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  • The Atom
    • Proton
      • Relative charge: +1
      • Relative mass: 1
      • Location: the nucleus
    • Neutron
      • Relative charge: 0
      • Relative mass: 1
      • Location: the nucleus
    • Electron
      • Relative charge: -1
      • Relative mass: 0.00055
      • Location: shells
    • Mass number
      • The top number
      • A
      • The number of protons and neutrons in the nucleus
    • Atomic number
      • The bottom number
      • Z
      • The number of protons in the nucleus
        • Which equals the number of electrons
    • Isotopes
      • Atoms with the same number of protons and electrons but different numbers of neutrons.
      • The isotopes do the same chemical reactions as they have the same number of electrons in their outer shell.
      • They have different physical properties, such as mpt, bpt, and rate of reaction because they have different masses.


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