atomic number 15

`1S^2,2S^2,2P^6,3S^2,3P^3`

atomic number 12

`1S^2,2S^2,2P^6,3S^2`

atomic number 9

`1S^2,2S^2,2P^5`

atomic number 18

`1S^2,2S^2,2P^6,3S^2,3P^6`

atomic number 15

`1S^2,2S^2,2P^6,3S^2,3P^3`

atomic number 12

`1S^2,2S^2,2P^6,3S^2`

atomic number 9

`1S^2,2S^2,2P^5`

atomic number 18

`1S^2,2S^2,2P^6,3S^2,3P^6`