EVERYDAY SCIENCE

Detailed explanation-1: -Quarks are the smallest particles we know . Many quarks make up one electron, proton and neutron.

Detailed explanation-2: -Molecules make up everything around us and they are very, very small. But those molecules are made of atoms, which are even smaller. And then those atoms are made up of protons, neutrons and electrons, which are even smaller. And protons are made up of even smaller particles called quarks.

Detailed explanation-3: -The majority of the mass of the atom is found in the nucleus, which is made up of protons and neutrons. The part of the atom with the smallest mass is the electron.

Detailed explanation-4: -Electrons. Electrons are negatively charged particles that generally orbit the nucleus of an atom. Electrons are much smaller than protons or neutrons.

Detailed explanation-5: -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.