Answer Home › Forums › setting the stage › solids as quantum systems › Answer This topic has 0 replies, 1 voice, and was last updated 2 days, 19 hours ago by Wendy. Viewing 1 post (of 1 total) Author Posts June 18, 2026 at 11:48 am #14669 WendyParticipant Definition of a solid: Bound atoms, either ordered (crystalline) or disordered (amorphous), within a lattice. Without independent movement of neighboring atoms and with minimal vibration or free path length compared to liquids or gases. What I see here: a hydrogen atom What I see now: 2 hydrogen atoms Object: H2—a molecule 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