Solids are a type of matter that hold their constituent particles tightly packed by using strong intermolecular forces and short internuclear distance. At low temperatures, the solid particles oscillate at their mean pos... More » Science Chemistry Atoms & Molecules

Every living and non-living component that comprises matter consists of molecules, which are formed from the chemical combination of microscopic particles known as atoms. Unlike atoms, molecules are able to transition fr... More »

The atomic theory formulated by the British chemist John Dalton proposes that atoms are indivisible particles comprising all matter; atoms of the same element share identical properties, including shape, size and mass; a... More »

Leptons and quarks constitute the smallest particles of matter, based on contemporary evidence in the field of particle physics. Traditionally, the atom was considered as the indivisible form of matter. More »

Intermolecular forces are the attractive forces between molecules that hold them together. There are four types of intermolecular forces: hydrogen bonds and ionic, dipole and induced dipole forces. More »

Atoms become radioactive when they have an excess of protons or neutrons in the nucleus, leading to unbalanced internal forces, which the atom balances by emitting radiation. Atoms with a different amount of neutrons or ... More »

The attractive forces that hold the molecules of a liquid together are always the result of opposite charges from the opposite ends of polar molecules, although that polarity is not always inherent to the molecules invol... More » Science Chemistry Atoms & Molecules