A complete periodic table dataset covering elements 1 (Hydrogen) through 118 (Oganesson). Each row includes the atomic symbol, name, atomic mass, category (alkali metal, noble gas, lanthanide, etc.), group and period, electron configuration, phase at standard temperature and pressure, density, and melting and boiling points in Kelvin.
Pro tip: Elements 95 onward are all synthetic — none of them exist naturally on Earth. Several of the heaviest (104 onward) only exist for milliseconds in particle accelerators. Their published "boiling points" are theoretical estimates.
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About the Periodic Table Dataset
The periodic table is the canonical reference for chemistry, organizing all known elements by atomic number and grouping them by electron-shell behavior. This dataset uses IUPAC-recommended values for atomic mass and the categorization scheme found in major chemistry textbooks. Properties are taken from CRC Handbook of Chemistry and Physics and PubChem.
Common Use Cases
Chemistry homework and quiz applications, periodic-table reference web apps, science education materials, molecular weight calculators, lab inventory systems, materials-science data pipelines, and any app that needs accurate element mass for stoichiometric calculations.
Column Reference
- atomic_number — number of protons (1-118).
- symbol, name — chemical symbol and English name.
- atomic_mass — standard atomic weight per IUPAC.
- category — alkali metal, alkaline earth, transition metal, post-transition metal, metalloid, nonmetal, halogen, noble gas, lanthanide, actinide.
- group / period — column and row position on the table.
- electron_config — ground-state electron configuration in standard noble-gas notation.
- phase_stp — phase at standard temperature and pressure (Solid, Liquid, Gas).
- density_g_cm3 — density in grams per cubic centimeter (where measured).
- melting_point_k, boiling_point_k — phase-change temperatures in Kelvin.
Synthetic Elements (Z >= 93)
Elements 93 (Neptunium) through 118 (Oganesson) are produced synthetically in nuclear reactors or particle accelerators. The heaviest known elements (Z >= 104) have half-lives measured in milliseconds or microseconds — physical-property values for them are extrapolations from relativistic quantum-chemistry calculations rather than direct measurements.
Atomic Mass Conventions
Atomic masses use the unified atomic mass unit (u, approximately 1.66 × 10⁻²⁷ kg). For naturally occurring elements, the value is the standard atomic weight (a weighted average across isotopes). For synthetic elements without a stable isotope, the value is the mass number of the longest-lived known isotope in square brackets in some references; this dataset gives the bare number for direct use in calculations.
