Pressure fixed at 1 atm. Carbon and arsenic sublime (solid → gas); helium never freezes at 1 atm. Elements without measured melting and boiling points show as unknown rather than guessed.
Keys: Ctrl K or / search everything · 1–6 switch world · ←→↑↓ move between elements in any layout · Enter open · [] previous/next by atomic number · Esc close / back to Classic · start typing to search. Links: #Fe, #atomic/Au, #lab.
Data: IUPAC 2021 abridged standard atomic weights ([ ] = reference-isotope mass numbers); NIST ground-state configurations (Z ≥ 104 predicted), ionization energies and emission lines (NIST Atomic Spectra Database); Cordero 2008 covalent radii; Pauling electronegativity; melting/boiling points at 1 atm, densities and electron affinities cross-checked against the PubChem periodic table (public domain, CRC/NIST-based); * marks estimates; stable and primordial isotopes; qualitative nucleosynthesis origins after J. A. Johnson. Models are labelled as models. Elements 109–118 are drawn dashed: their chemistry is predicted, not measured.