Question

The smallest particle of matter is called

• A. (a) atom
• B. (b) molecule
• C. (c) element
• D. (d) compound

Answer 1

The correct option is A

(a) atom

Correct option explanation:

(a) atom:

• The basic building block unit of matter is an atom.
• Atom is the smallest particle of an element that retains the properties of the element.
• It is the smallest particle that takes part in the chemical reaction

incorrect option explanation:

(b) molecule: It is made up of two or more atoms that are bound together by chemical bonding.

(c) element: A pure substance that is made up of only one kind of atom and cannot be broken into two or simpler substances by physical or chemical means is referred to as an element.

(d) compound: When atoms of different elements combine in a fixed ratio, it results in the formation of a compound.

Concluding statement: The smallest particle of matter is called an atom. Hence, option (a) is the correct answer.