How do atoms move around?

Answer 1

Electrons circling around the nucleus provide momentum therefore allowing the atoms to move around randomly.

Here is a long answer pulled up from the internet with the original question "Do atoms move?" It provides some aspects to the answer you want to your question:

Yes. Atoms are in constant motion.

In an atom, electrons in motion around the nucleus possess orbital angular momentum in addition to their spin, while the nucleus itself possesses angular momentum due to its nuclear spin. The magnetic field produced by an atom-its magnetic moment-is determined by these various forms of angular momentum, just as a rotating charged object classically produces a magnetic field. However, the most dominant contribution comes from spin.

Also, the motion of atoms on a non-quantum level is referred to as thermal energy. A part of thermal energy is Internal energy - the sum of all microscopic forms of energy of a system. It is related to the molecular structure and the degree of molecular activity and may be viewed as the sum of kinetic and potential energies of the molecules. Since any amount of thermal energy can be expressed in degrees of temperature, the only time that molecular motion stops is if you reach 'absolute zero'. (−273.15 C or −459.67 F)

Absolute zero is the lowest possible temperature where nothing could be colder, and no heat energy remains in a substance. Absolute zero is the point at which molecules do not move (relative to the rest of the body) more than they are required to by a quantum mechanical effect called zero-point energy. It is a theoretical limit and cannot be achieved with the current technology available.

Answer 2

Atoms move around due to their kinetic energy, resulting in random motion and collisions with other atoms. This movement is influenced by factors such as temperature, pressure, and the presence of other atoms or molecules in the surroundings. The motion of atoms is further governed by principles of thermodynamics and the laws of physics that dictate how particles interact with each other.