Question

Which best describes an element?
A) An element is composed of identical atoms
B) A pure substance
C) a material that has consistent chemical properties
D) Both A & B

Answer 1

Both A & B best describes an element

Answer 2

answer : option (D) both A & B

explanation : An element is pure substance. It is a species of atom having the same number of protons in their atomic nuclei.

for example, atomic number of nitrogen is 7 and also number of protons in nitrogen is 7.

from above definition, it is clear that an element is composed of identical atoms and most important things is that it is pure substance.

hence, option (D) is correct choice.