Atoms and elements

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  • Created by: shutupmeg
  • Created on: 05-02-14 17:11
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  • Atoms and Elements
    • Nucleus contains positive protons and neutral neutrons
      • Nucleus has overall positive charge
    • Negative electrons move around the nucleus in shells/energy levels
      • If an atom gains or loses electrons, its becomes charged and is an ion
    • Atoms have no overall charge
    • Number of protons = number of electrons
    • It's the number of protons that decides what atom it is


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