Which electron configuration represents the electrons of an atom in an excited state? 1
2-5
2
2-8-5
3
2-5-1
4
2-6

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:

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