Question 5 Which of the following is not aromatic 3 a. Xylene b. Pyridine c. Anthracene d. None of the above

Iknow the answer is a but i don't know why

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.

This image is an example of a(n) a) atom. b) compound. c) mixture. d) molecule.