Question

how many electrons does hydrogen have in its valence shell when it is full? (1 point)
one
two
eight
seven

Explanation:

Hydrogen has only one electron shell (\(n = 1\)). According to the rule \(2n^{2}\) (where \(n\) is the principal quantum number of the shell), for \(n = 1\), the number of electrons in a full shell is \(2\times1^{2}=2\).

Answer:

two