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Science

Name an element with atomic number 21 to 30.

Both endpoints count. Names or symbols accepted.

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Start with the full category, then apply the exact boundary: Both endpoints count. Names or symbols accepted. You only need one qualifying answer. A longer name is not automatically rarer.

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CobaltCobalt (Co) has atomic number 27 on the IUPAC periodic table.
83

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Shortest accepted input at 65+ points

V

Vanadium · 94 points · 1 characters

Vanadium (V) has atomic number 23 on the IUPAC periodic table.

Highest fixed score

Scandium

96 points · Shortest accepted spelling: Sc

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10 accepted answers

ScandiumScandium (Sc) has atomic number 21 on the IUPAC periodic table.Aliases: ScShortest accepted input: Sc · 2 characters
96 points
VanadiumVanadium (V) has atomic number 23 on the IUPAC periodic table.Aliases: VShortest accepted input: V · 1 characters
94 points
ManganeseManganese (Mn) has atomic number 25 on the IUPAC periodic table.Aliases: MnShortest accepted input: Mn · 2 characters
89 points
CobaltCobalt (Co) has atomic number 27 on the IUPAC periodic table.Aliases: CoShortest accepted input: Co · 2 characters
83 points
ChromiumChromium (Cr) has atomic number 24 on the IUPAC periodic table.Aliases: CrShortest accepted input: Cr · 2 characters
77 points
NickelNickel (Ni) has atomic number 28 on the IUPAC periodic table.Aliases: NiShortest accepted input: Ni · 2 characters
64 points
TitaniumTitanium (Ti) has atomic number 22 on the IUPAC periodic table.Aliases: TiShortest accepted input: Ti · 2 characters
59 points
ZincZinc (Zn) has atomic number 30 on the IUPAC periodic table.Aliases: ZnShortest accepted input: Zn · 2 characters
57 points
CopperCopper (Cu) has atomic number 29 on the IUPAC periodic table.Aliases: CuShortest accepted input: Cu · 2 characters
25 points
IronIron (Fe) has atomic number 26 on the IUPAC periodic table.Aliases: FeShortest accepted input: Fe · 2 characters
20 points
Rule examples & common mix-ups — may reveal answers
  • 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.

These notes explain the question boundary; they are not a ranking of player mistakes.

Why these answers qualify

Each entry belongs to the bounded set defined by the prompt. The named source supports the underlying facts; our editorial scoring is a separate layer.

Source: IUPAC · Periodic table ↗

Reference version: 2026-09-13. See our answer policy for how we handle aliases and omissions.