Which element has a total of 5 occupied principal energy levels?

cadmium

nitrogen

vanadium

gold

Answer;

cadmium

Explanation; Cadmium is a transition metal. The transition metals are the elements found in Rows 4 through 7 between Groups 2 and 13 in the periodic table. It has an atomic number of 48, and an atomic mass of 112.411 and has 48 electrons which occupies 5 energy levels. The element has an electron configuration of 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2. or Kr 4d10 5s2