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Start with the full category, then apply the exact boundary: Group 1 metals, atomic numbers 1–30. Hydrogen is not a metal. Names or symbols are accepted. You only need one qualifying answer. A longer name is not automatically rarer.
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KPotassium · 85 points · 1 characters
Potassium (K) has atomic number 19 and belongs to group 1 (alkali metals), within the 1–30 limit.
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Potassium85 points · Shortest accepted spelling: K
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- Both the element’s group and the atomic-number limit must fit. A chemical symbol is an accepted spelling, not a way to bypass either restriction.
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Source: IUPAC · Periodic table (4 May 2022) ↗
Reference version: 2026-10-02. See our answer policy for how we handle aliases and omissions.