EVERYDAY SCIENCE

Detailed explanation-1: -molecule, a group of two or more atoms that form the smallest identifiable unit into which a pure substance can be divided and still retain the composition and chemical properties of that substance.

Detailed explanation-2: -When atoms combine by forming covalent bonds, the resulting collection of atoms is called a molecule. We can therefore say that a molecule is the simplest unit of a covalent compound.

Detailed explanation-3: -Chemists therefore use a unit called the mole. One mole of molecules of water, for example, contains 6.022140758 x 1023 molecules.

Detailed explanation-4: -A molecule is two or more atoms connected by chemical bonds, which form the smallest unit of a substance that retains the composition and properties of that substance. Molecules form the basis of chemistry. Molecules are noted with the element symbol and a subscript with the number of atoms.

Detailed explanation-5: -The mole (symbol mol) is the unit of amount of substance in the International System of Units (SI).