In the context of molecules of elements, which statement correctly explains the term atomicity?
It is the number of atoms present in a molecule
Atomicity is defined as the total number of atoms present in one molecule of an element. For example, helium (He) is monoatomic (atomicity 1), oxygen (O₂) is diatomic (atomicity 2), ozone (O₃) is triatomic, and phosphorus (P₄) is tetra-atomic.
The number of shells, electrons or total mass are different atomic/molecular properties and are not referred to as atomicity.
Hence, the correct answer is It is the number of atoms present in a molecule.
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Important Questions from Basic Concepts of Chemistry
- Which law states that a compound always contains the same elements in the same proportion by mass?
- Which of the following is NOT applicable to the Law of Constant Proportion?
- Which of the following best differentiates a mixture from a compound?
- Which of the following is an element?
- Which of the following best defines a heterogeneous mixture?
