Question

How many electrons does hydrogen have in its valence shell when it is full?
A. seven
B. eight
C. one
D. two

Answer 1

Hydrogen has one electron in its valence shell, and when it forms a bond (for example, covalently bonding with another hydrogen or another atom), it can effectively "fill" its valence shell by sharing or gaining one more electron—reaching a total of two electrons. However, in its neutral state, hydrogen has only one electron. Therefore, the correct answer based on the options given is:

C. one