Home › Forums › setting the stage › solids as quantum systems › solid This topic has 1 reply, 1 voice, and was last updated 2 weeks, 1 day ago by Tuur.B. Viewing 2 posts - 1 through 2 (of 2 total) Author Posts September 27, 2025 at 1:46 pm #13176 Tuur.BParticipant A solid is a state of matter where the particles are packed closely together, so it keeps a fixed shape and a fixed volume. Solids do not flow like liquids or spread out like gases. September 27, 2025 at 1:59 pm #13178 Tuur.BParticipant 1: A hydrogen atom 2: 2 non interacting hydrogen atoms 3: A helium atom 4: If d equals zero Author Posts Viewing 2 posts - 1 through 2 (of 2 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In