Hi, first of all I'd like to say hello as I'm new to this forum. Here are my questions: If a single atom would be held in an empty room (vacuum/no gravity) would it move or would it stand still? If it does move what would the movement would look like? The same question goes for molecules e.g. O2 If there was a bunch of O2 molecules would their movement be influenced by intermolecular forces? Thanks in advance!