Which TWO changes of state can occur when a substance gains thermal energy?

A. Sublimation
B. Condensation
C. Vaporization
D. Deposition

How many ions that have a +1 charge will bond with an ion that has a -2 charge

Which statement about the stamps is correct?

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line