KRILLIONIO GAME

Science

Name an element with a one-letter symbol and atomic number 30 or below.

Both conditions must match. Names and symbols accepted.

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

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FluorineFluorine (F) has atomic number 9 on the IUPAC periodic table.
74

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VanadiumVanadium (V) has atomic number 23 on the IUPAC periodic table.Aliases: V
94
FluorineFluorine (F) has atomic number 9 on the IUPAC periodic table.Aliases: F
74
BoronBoron (B) has atomic number 5 on the IUPAC periodic table.Aliases: B
72
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
PotassiumPotassium (K) has atomic number 19 on the IUPAC periodic table.Aliases: K
52
NitrogenNitrogen (N) has atomic number 7 on the IUPAC periodic table.Aliases: N
38
CarbonCarbon (C) has atomic number 6 on the IUPAC periodic table.Aliases: C
18
HydrogenHydrogen (H) has atomic number 1 on the IUPAC periodic table.Aliases: H
15
OxygenOxygen (O) has atomic number 8 on the IUPAC periodic table.Aliases: O
12

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.

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