HELP PLZ AND PLZ EXPLAIN VERY SIMPLE

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Review the branily terms and services guides well u know what i never did so go have a nice ice cream sunday

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.

What is the mass of 8 moles of sodium atoms