EVERYDAY SCIENCE

Detailed explanation-1: -An atom is the smallest particle of an element, having the same chemical properties as the bulk element.

Detailed explanation-2: -An atom is the smallest particle of an element that can retain all the chemical properties. It is the indivisible unit of matter that can exist independently. It is a building block of matter.

Detailed explanation-3: -The smallest particle of an element is called an atom.

Detailed explanation-4: -Thus, helium is the smallest element, and francium is the largest. From top to bottom in a group, orbitals corresponding to higher values of the principal quantum number (n) are being added, which are on average further away from the nucleus, thus causing the size of the atom to increase.

Detailed explanation-5: -Electron: Electrons are negatively charged particles that revolve around the nucleus. Proton: Protons are the positively charged particles present in the nucleus. Neutrons: Neutrons are the neutral particles present in the nucleus along with protons.