Which electron configuration represents the electrons in an atom sulfur in an excited state? Choice number 2 (1) 2-8-6 (3) 2-8-7 (2) 2-7-7 (4) 2-7-8 I NEED HELP FAST

Calcium chloride +gold(1) oxide—>

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.

Acompound contains c, h, and o atoms. when 1.130 g of the compound is burned in oxygen, 1.064 g co2 and 0.3631 g h2o are produced. what is the empirical formula of this compound?