Question

Oxygen has an atomic number of 8. The n = 1 energy level has two electrons, and the n = 2 energy level has six electrons. Oxygen's valence is _____.

-2
-1
+2
+1

Answer 1

Answer:

The correct answer is -2

Oxygen has 6 valence electrons, which is 2 electrons short of a neutral charge, thus it is -2