Assertion (A) : Ammonia (NH3) is an example of a molecule of an element.
Reason (R) : Molecules formed by same kind of atoms is known as molecule of an element.
Both (A) and (R) are true, and (R) is correct explanation of (A).
(a) What is an atom ? How do atoms usually exist?
(b) What is a molecule? Explain with an example.
(c) What is the difference between the molecule of an element and the molecule of a compound ? Give an example of each.
Assertion (A): Ozone is an example of a molecule of an element.
Reason (R): Molecules formed by different kind of atoms is known as molecule of an element.