1) what is the electron configuration of an electrically neutral atom of sodium?
2) what is the electron configuration of an electrically neutral atom of neon?
3) what is the electron configuration of an electrically neutral atom of oxygen?

1) 1 s2 2 s2 2 p6 3 s1

2) 1 s2 2 s2 2 p6

3) 1 s2 2 s2 2 p4

Explanation:

1) Sodium is a element with 11 electrons in 3 levels of energy

2) Neon is a element with 10 electrons in 2 levels of energy

3) Oxygen is a element with 8 electrons in 2 levels of energy

the product of the pressure and volume is also constant