2.2.1 Shells and Orbitals

2.2.1 Shells and Orbitals

1. Shells

   • 2n^2 to work out the maximum amount of electrons a shell can hold

2. Atomic Orbital

   • a region of space that is likely to hold 2 electrons, with opposite spins

3. What shape is a s orbital?

   • spherical

4. What shape is a p orbital?

   • 3D dumbell shape

5. subshells fill up in this order

   • 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 4d, 4f

6. How do orbitals fill up?

   • lowest energy levels
   • last in, first out
   • filled singly before pairing

7. electrons have opposite spins