Which item belongs in the same documented group as helium in the chemical element family scope?

Answer options

• Option: sodium
  "sodium" vs. "argon" Sodium is stored as an alkali metal; misses the target mapping. sodium stays thematically plausible but misses the requested target. The task targets this mapping, so sodium remains wrong in this prompt. sodium stays relevant in the graph profile but does not carry the requested relation.
• Option: iron
  "iron" vs. "argon" Iron has a documented but different; misses the target mapping. iron stays thematically plausible but misses the requested target. The task targets this mapping, so iron remains wrong in this prompt. iron stays relevant in the graph profile but does not carry the requested relation.
• Option: oxygen
  "oxygen" vs. "argon" Oxygen remains in the same scope but in; misses the target mapping. oxygen stays thematically plausible but misses the requested target. The task targets this mapping, so oxygen remains wrong in this prompt. oxygen stays relevant in the graph profile but does not carry the requested relation.
• Correct: argon
  "argon" - target Argon is a second noble-gas option and serves as a multi-hit. argon matches the requested target of this prompt most precisely. The task targets this mapping, and argon remains correct in this prompt. argon remains tied to the requested relation through direct in the graph profile.

Solution

argon

"argon" is correct: Argon is a second noble-gas option and serves as a multi-hit fixture. The prompt targets argon, so the graph keeps this mapping stable against close alternatives. Source: Wikidata. As of: 2026-02-13.

Fun fact

same_group_pick uses two direct membership claims here and keeps all distractors in other groups of the same scope. argon stays anchored with additional dataset context. The graph therefore uses a direct graph path.