Recolor the table by what's actually doing the organizing — electron blocks, periods, groups, or trend in size and energy. Tap any element to see its electron configuration and why it sits where it does.
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Tap an element for details ↓
Electron configurations follow standard Aufbau filling with the known irregularities (Cr, Cu, Mo, Ag, Pd, Pt, Au, La, Ce, Gd, U, etc.) flagged on the element card. Atomic radii are empirical (Slater 1964 / Clementi 1967). First-ionization energies from NIST Atomic Spectra Database. Pauling-scale electronegativities from IUPAC.
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