A crystal is made up of?

A)the number of atoms given in a formula unit

B)Many molecules thats are represented by the formula unit

C)Many atoms that are arranged in a regular pattern

HELP PLEASE ASAP

the molecules move in straight line until they collide with each other or with the walls of the container. collisions are perfectly elastic; when two molecules collide, they change their directions and kinetic energies, but the total kinetic energy is conserved.

explanation:

answermeridional ;