EVERYDAY SCIENCE

Detailed explanation-1: -Atom: (1)Atoms are the building block of matter. (2)An atom may be defined as the smallest particles of the element which may or may not have independent existence. (3)However, it is the smallest particles which take part in chemical reactions. Therefore, an atom is a basic unit of matter.

Detailed explanation-2: -An atom is the smallest unit of matter that retains all of the chemical properties of an element.

Detailed explanation-3: -The basic unit of matter is the atom. Atoms are defined as the building blocks of matter that contain a nucleus consisting of protons and neutrons with electrons orbiting the nucleus. Each element that exists in the periodic table consists of a different combination of protons, neutrons, and electrons.

Detailed explanation-4: -Atoms are the smallest unit of matter that can exist independently.

Detailed explanation-5: -The atomic mass unit (AMU or amu) of an element is a measure of its atomic mass. Also known as the dalton (Da) or unified atomic mass unit (u), the AMU expresses both atomic masses and molecular masses.