In the periodic table of elements, some elements share similar properties and have the same number of valence electrons in their outer shell. what do we call these type of elements in the periodic table of elements.

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.