Question

what is the number of valence electrons in cadmium (cd)?
1
2
10
12

Explanation:

Cadmium (Cd) is in group 12 of the periodic table. Elements in group 12 have 2 valence electrons. The electron configuration of Cd is \([Kr] 4d^{10} 5s^{2}\), and the valence electrons are in the outermost shell (5s), so there are 2 valence electrons.

Answer:

B. 2