State the element in which valence electron are `2p^(4) ,3s^(2) ,3p^(3)`

Explanation

`2p^(4) ` Means : `1s^(2) 2s^(2) 2p^(4) ` and `Z=8` (oxygen )
`3s^(2) ` means `:1s^(2) 2s^(2) 2p^(6) 3s^(2)` and `Z=12` (mg element )
`2p^(3) ` means `: 1s^(2) 2s^(2) 2p^(3)` and `z=7 ` (N element )