Which of the following are polyatomic ions? Check all that apply a. Co
b. CN
c. H
d. CO3
e. Fr
f. NH4

The tilt of the earth's axis of rotation is responsible for the a) ocean's tides. b) size of the moon. c) brightness of stars. d) earth’s seasons.

An electron moved from shell n = 2 to shell n = 1. what most likely happened during the transition? a fraction of a photon was added. a photon of energy was absorbed. a fraction of a photon was removed. a photon of energy was released.

Under normal conditions, describe how increasing the temperatures effects the solubility of a typical salt