Chemistry NMDCAT MCQs Moles and Avogadro's Numbers Moles and Avogadro’s Numbers

nmdcat.online July 13, 2026

Regarding representative particles, one mole of calcium ions contains

A. 6.02 × 10²³ calcium ions

✓

B. 6.02 × 10²³ calcium atoms

C. 3.01 × 10²³ calcium ions

D. 1.20 × 10²⁴ calcium atoms

📝 Explanation

Representative particles depend on the species present. One mole of Ca²⁺ contains Avogadro's number of calcium ions, not atoms. Concept tested: Representative particles.

📖 Additional Information

6.02 × 10²³ calcium ions
6.02 × 10²³ calcium atoms
3.01 × 10²³ calcium ions
1.20 × 10²⁴ calcium atoms

Representative particles depend on the species present. One mole of Ca²⁺ contains Avogadro's number of calcium ions, not atoms. Concept tested: Representative particles.

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