Question

Atomicity of oxygen in ozone molecule is:

• A. 1
• B. 2
• C. 3
• D. 4

Hint:

The atomicity of a molecule refers to the number of atoms of the element present in a molecule.

Answer 1

The Correct Option is C

• Atomicity of Oxygen in Ozone (O₃) - The atomicity refers to the number of atoms of the element present in one molecule of a compound. In the case of ozone (O₃), the molecule consists of three oxygen atoms, so the atomicity of oxygen in ozone is 3.

Explanation: 

The molecule of ozone (O₃) consists of three oxygen atoms bonded together. Therefore, the atomicity of oxygen in ozone is 3, as there are three oxygen atoms in one molecule of ozone.

Answer 2

Atomicity simply means how many atoms of an element are bonded together in one molecule of it, so the question is really asking how many oxygen atoms make up one ozone molecule.

1. 1: An atomicity of 1 would mean ozone exists as single, unbonded oxygen atoms, which is not the case, ozone is a molecule, not a lone atom.
2. 2: An atomicity of 2 describes ordinary oxygen gas, O2, which is a different molecule from ozone and has one fewer oxygen atom than ozone does.
3. 3: The chemical formula of ozone is O3, meaning three oxygen atoms are bonded together in a bent shape to form one ozone molecule. This directly matches the definition of atomicity as the count of atoms per molecule.
4. 4: No common form of elemental oxygen has four atoms bonded together in one molecule, so this option does not correspond to any real oxygen species.

Since one ozone molecule is written as O3, it contains three bonded oxygen atoms.

So the correct answer is 3.