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MHT CET2008ChemistryStructure of Atom

An isobar of ₂₀ Ca ⁴⁰ is

Options

  1. A18 Ar ⁴⁰
  2. B₂₀ Ca ³⁸
  3. C₂₀ Ca ⁴²
  4. D₁₈ Ar ³⁸

Correct answer

A. 18 Ar ⁴⁰

Step-by-step solution

Isobars have same atomic mass but different atomic number. Thus, the isobar of ₂₀ Ca ⁴⁰ is ₁₈ Ar ⁴⁰

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