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electrons in atoms - Coggle Diagram

- - - - region of space around nucleus
      - occupied by 1 or 2 electrons
      - shapes
        
        p orbital: hourglass (two lobes) along x,y,z axes
        
        d orbital: complex shape
        
        s orbital: spherical
    - - s sub shell: 1 orbital, max 2 electrons
      - p sub shell: 3 orbitals, max 6 electrons
      - d sub shell: 5 orbitals, max 10 electrons
    - - lowest energy filled first
      - order not always regular
  - - - box = orbital
      - arrow = electron
      - paired electrons = opposite spin
      - spin-pair repulsion
      - arrow direction = electron spin
  - - - shell 1: up to 2
      - shell 3: up to 18
      - shell 4: up to 32
      - shell 2: up to 8