The smallest particle of matter which is capable of independent existence and which exhibits the properties of the matter is called the molecule of the matter. Example of molecules are O 2 , N 2 , H 2 and P 4 etc.

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The chemical formula of ammonia is _____.

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Important Questions on Atoms and Molecules

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Science>Chemistry>Atoms and Molecules>Molecule

Which among the given options is not an inert gas?

MEDIUM

Science>Chemistry>Atoms and Molecules>Molecule

Select the correct options from the following statements:

I. ${}_{6}^{12}C$ and ${}_{6}^{14}C$ are isobars of each other.

II. ${}_{6}^{12}C$ reacts with ${}_{8}^{16}O$ to form a product which contains ionic bonds.

III. ${}_{20}^{40}{Ca}$ and ${}_{18}^{40}{Ar}$ are isobars of each other.

IV. ${}_{20}^{40}{Ca}$ reacts with ${}_{8}^{16}O$ to form a compound whose aqueous solution is known as lime water.

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Science>Chemistry>Atoms and Molecules>Molecule

Atomicity of oxygen in ozone molecule is

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Science>Chemistry>Atoms and Molecules>Molecule

Give two examples of molecules having only one kind of atoms.

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Science>Chemistry>Atoms and Molecules>Molecule

The ratio of masses of sulphur and oxygen is 2:3 and their atomic masses are 32 and 16 in one molecule of sulphur trioxide. The ratio of atoms of sulphur and oxygen in sulphur trioxide is:

MEDIUM

Science>Chemistry>Atoms and Molecules>Molecule

Classify each of the following on the basis of their atomicity.
(a)