Periodic Table

Formula

\text{Molar Mass} = \sum_{i} n_i M_i, \quad \rho = \frac{m}{V}, \quad \text{Valence Electron Shells}

IUPAC standard atomic weights, electron configurations, crystal structures, and thermophysical properties.

Assumptions

• · Standard temperature and pressure (STP: 298.15 K, 100 kPa) for density and phase states
• · Terrestrial isotopic abundance used for standard relative atomic mass values