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chapter 5, the electrons (electron configurations (1s, 2s 2p, 3s 3p 3d, 4s…

- - - - bucket filling with water bottom to the top
- - - - low energy- R O Y G B I P - high energy
  - - - when atoms absorb energy, electrons move into higher energy levels. they will then lose energy and emit when they return lower energy levels.
    - - light emitted as electron jumps
      - the bugger the jump the more light is emitted
- - - - n=2
        
        2 sub-levels
        
        2s (1 orbital), 2p (3 orbitals)
      - n=3
        
        3 sub-levels
        
        3s (1 orbital), 3p ( 3 orbital), 3d (5 orbitals)
      - n=1
        
        1 sub-level
        
        1s (orbital)
      - n=4
        
        4 sub-levels
        
        4s (1 orbital), 4p (3 orbitals), 4d (5 orbitals), 4f (7 orbitals)