2. Tick the most appropriate answer:
(iv) The smallest unit of an element, which may or may not have an independent existence, but always take part in a chemical reaction, is called
2. Tick the most appropriate answer:
(iv) The smallest unit of an element, which may or may not have an independent existence, but always take part in a chemical reaction, is called
The correct option is B atoms
Explanation for correct option:
(B)
Atom is defined as the smallest unit of an element, which may or may not have an independent existence, but always takes part in a chemical reaction. It is defined as the smallest unit of an element.
Explanation for incorrect options:
(A)
A molecule is defined as the smallest unit of matter, which has an independent existence and can retain the complete physical and chemical properties of matter.
(C)
An element is defined as a substance, which cannot be subdivided into two or more simpler substances by any chemical means.
(D)
Radicals are atoms of one element or a collection of atoms of other elements that function as a single unit with a positive or negative charge.
Hence, the correct answer is option (B).
atoms
Explanation for correct option:
(B)
Atom is defined as the smallest unit of an element, which may or may not have an independent existence, but always takes part in a chemical reaction. It is defined as the smallest unit of an element.
Explanation for incorrect options:
(A)
A molecule is defined as the smallest unit of matter, which has an independent existence and can retain the complete physical and chemical properties of matter.
(C)
An element is defined as a substance, which cannot be subdivided into two or more simpler substances by any chemical means.
(D)
Radicals are atoms of one element or a collection of atoms of other elements that function as a single unit with a positive or negative charge.
Hence, the correct answer is option (B).
