C2

C2

1. Atoms

   • Contains Protons, Neutrons and ELectrons
   • Proton
     • Relative Positive Charge +1 Relative Mass 1 Equal to electron Number
   • Neutron
     • Relative Neutral Charge 0 Relative Mass 1
   • Electron
     • Negative Relative Charge -1 Relative Mass 1/2000 Moves around nucleus Tiny in size but as they move they cover alot of space Size of orbit determines the size of the atom virtually no mass occupy shells
   • Necleus
     • Center of Atom Contains Only protons and neutrons Positively Charged Contains Most of the mass of the atom

2. Electron Shells

   • First Shell holds max 2 electrons 2nd and 3rd holds max 8
   • Can Also be called energy levels
   • Atoms prefer full outer shells
   • Argon
     • 18 protons
       • 2.8.8

3. Elements

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