The temperature levels in a a nuclear reactor are maintained primarily by the use of

What overall charge must all compounds have

Which sentence about particles in matter is true? a. atoms are present in solids and liquids but not in gases. b. the particles of matter are in constant motion. c. the same kinds of atoms are found in different elements. d. when a solid changes to a liquid, the sizes of the particles change.

Which factor is likely to impact the possible number of compounds ?