Which is/are true?

[mark all correct answers]

a. Li has valence electrons in the n = 1 energy level.

b. Si has valence electrons in the n = 3 energy level.

c. Ga has valence electrons in the n = 3 energy level.

d. Xe has valence electrons in the n = 5 energy level.

e. P has valence electrons in the n = 2 energy level.

b. Si has valence electrons in the n = 3 energy level.

d. Xe has valence electrons in the n=5 energy level

Explanation:

A silicon atom has 14 electrons and 14 protons in its structure. Therefore it has a simple electron configuration of 2.8.4

It therefore has 3 energy levels. The outermost 4 electrons are the valence electrons.

A xenon has an electron configuration of 2.8.18.18.8 = 5 energy levels. The outermost 8 electrons are the valence electrons.