Chemical reaction

Key concepts

How Chemical reaction connects to the ideas, people and events around it.

1. Chemistry

   Chemistry is the scientific study of the properties and behavior of matter.

2. Substance (chemistry)

   In chemistry, a substance is a unique form of matter with constant chemical composition and characteristic properties. Chemical substances may take the form of a single element or chemical compounds.

3. Atom

   Atoms are the basic particles of the chemical elements and the fundamental building blocks of matter. An atom consists of a nucleus of protons and generally neutrons, surrounded by an electromagnetically bound swarm of electrons.

4. Gibbs free energy

   In thermodynamics, the Gibbs free energy is a thermodynamic potential that can be used to calculate the maximum amount of work, other than pressure–volume work, that may be performed by a thermodynamically closed system at constant temperature and pressure.

5. Electron

   The electron is a subatomic particle whose electric charge is negative one elementary charge. It is an elementary particle contained in the matter that makes up the universe.

6. Chemical bond

   A chemical bond is the association of atoms or ions to form molecules, crystals, and other structures.

7. Atomic nucleus

   The atomic nucleus is the small, dense region consisting of protons and neutrons at the center of an atom, discovered in 1911 by Ernest Rutherford at the University of Manchester based on the 1909 Geiger–Marsden gold foil experiment.

8. Chemical equation

   A chemical equation is the symbolic representation (notation) of a chemical reaction in the form of symbols and chemical formulas.

Questions about Chemical reaction