What is a solid Home › Forums › setting the stage › solids as quantum systems › What is a solid This topic has 0 replies, 1 voice, and was last updated 6 hours, 1 minute ago by adityaanirudhk. Viewing 1 post (of 1 total) Author Posts September 19, 2026 at 7:09 am #14969 adityaanirudhkParticipant I would define solid as a state of matter which has densely and closely packed atoms when looked at its atomic structure. The alignment of the atoms can either be periodic or non periodic in nature. Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In