How many number of electron in n=3?

Ineed with a, b, c, d, and e on the long answer

Which statement best describes the relationship between period and frequency of light waves? a) in wave b the period increases and the frequency decreases from wave a. b) in wave a the period increases and the frequency decreases from wave b. c) in wave b the period is shorter and the frequency is greater than in wave a. d) in wave a the period is shorter and the frequency is greater than in wave b.

Use the periodic table to determine the electron configuration of dysprosium (dy) and americium (am) in noble-gas notation.