KRILLIONIO GAME

Science

Name an element with atomic number 11 to 20.

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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ArgonArgon (Ar) has atomic number 18 on the IUPAC periodic table.
78

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ArgonArgon (Ar) has atomic number 18 on the IUPAC periodic table.Aliases: Ar
78
PhosphorusPhosphorus (P) has atomic number 15 on the IUPAC periodic table.Aliases: P
68
SulfurSulfur (S) has atomic number 16 on the IUPAC periodic table.Aliases: S · Sulphur
60
MagnesiumMagnesium (Mg) has atomic number 12 on the IUPAC periodic table.Aliases: Mg
54
PotassiumPotassium (K) has atomic number 19 on the IUPAC periodic table.Aliases: K
52
ChlorineChlorine (Cl) has atomic number 17 on the IUPAC periodic table.Aliases: Cl
50
SiliconSilicon (Si) has atomic number 14 on the IUPAC periodic table.Aliases: Si
49
SodiumSodium (Na) has atomic number 11 on the IUPAC periodic table.Aliases: Na
42
CalciumCalcium (Ca) has atomic number 20 on the IUPAC periodic table.Aliases: Ca
39
AluminiumAluminium (Al) has atomic number 13 on the IUPAC periodic table.Aliases: Al · Aluminum
35

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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.

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