Oxygen (Atomic Number 8) Requires How Many Additional Electrons to Fill

Question

Oxygen (atomic number 8) requires how many additional electrons to fill its outer electron shell?
A) 1
B) 2
C) 4
D) 6
E) 8

Accepted Answer

Oxygen has 6 electrons in its outer shell but it requires 8 electrons to fill its outermost shell. Therefore, it requires 2 additional electrons to fill its outer electron shell.