Home › Forums › setting the stage › solids as quantum systems › solid This topic has 0 replies, 1 voice, and was last updated 2 weeks ago by Zeno. Viewing 1 post (of 1 total) Author Posts September 28, 2025 at 10:47 am #13212 ZenoParticipant A solid is a substance in which the atoms or molecules are packed together in such a way that they remain in a fixed volume. Hydrogen atom two hydrogen atoms H_2 d = 0 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