Classification of matter chemistry worksheet need help ASAP

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.

Find the missing probability in the table below a.0.10 b.40 c.0.80 d. 0.20

The chemical formula for emerald is be3al2(sio3)6.an emerald can be decided as