Question

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

Explanation:

Cadmium (Cd) has an atomic number of 48. Its electron configuration is \([Kr]4d^{10}5s^{2}\). Valence electrons are the electrons in the outermost shell. Here, the outermost shell is the 5th shell with \(5s^{2}\), so there are 2 valence electrons.

Answer:

2