Answer: all of the above
Explanation:
Elements can exist in three different forms:
- solid: in a solid, the atoms of the element are tied together by strong molecular bonds. For this reason, the atoms cannot move from their fixed position, however they can vibrate.
- liquid: in a liquid, the atoms of the element are not tied together, so they can move from each other. However, there are still intermolecular forces that keeps the atom close to each other, so they cannot move freely.
- gas: in a gas, the atoms of the element are totally free to move, so they move with random velocities in every direction, in a motion called Brownian motion.
