Chemistry

Definition of crystallography

Crystallography is the name of a fascinating and very useful science in practice that focuses on the study of the properties and particularities of crystalline substances. Thanks to it, the external geometry, chemical composition and internal structure of the crystals are determined. In this field of knowledge there is […]

Definition of internal energy

Internal energy is a concept used in the field of Physics that allows us to identify, within a system and from the disordered and random movement of molecules, a reflection (considered on a macroscopic scale) of energy. The theory conceives it as the sum of both the internal kinetic energy and the […]

Definition of Le Châtelier principle

Le Châtelier's principle, formulated by the French chemist Henry-Louis Le Châtelier, states that if a system in equilibrium is disturbed by a change in concentration, temperature or pressure, it will react by adjusting its conditions to counteract said disturbance and restore the equilibrium. balance. A fundamental concept in this framework is the constant of […]

Definition of heavy metals

Heavy metals are the name given to certain high-density chemical elements that have metallic characteristics and are toxic to living beings, in addition to generating serious environmental problems. It must be taken into account that, over time, the definition of heavy metal has responded to the […]

Definition of Bohr atomic model

The Bohr atomic model is a presentation focused on atoms made in 1913 by a prominent Danish physicist named Niels Bohr. This contribution was motivated by the intention, taking Rutherford's atomic model as a starting point, to provide an explanation in relation to how matter achieves stability. Bohr […]

Definition of hydrogen bond

Hydrogen bond is the expression used to identify one of the intermolecular forces that gives rise to an attraction based on the interaction or dipole-dipole force. It arises when a hydrogen atom joins another atom that can be nitrogen, oxygen or fluorine with a negative charge. While at […]

Definition of atomic nucleus

Atomic nucleus is the name given to the heart of every atom. In that central portion, whose charge is positive, practically all the atomic mass is concentrated. Neutrons and protons, thanks to the effect of the strong nuclear force, coexist together in the center of the atom, being the constituents of what in nuclear physics is […]

Definition of nuclear fission

Nuclear fission is the name given to a reaction that occurs when the nucleus of an atom ends up segmenting into at least a pair of lighter nuclei (which are considered fission products and are usually very radioactive). In this framework, a series of byproducts even arise (such as photons, alpha particles […]

Definition of Boyle's law

Boyle's law is a postulate that links the pressure and volume of a certain level of gas that is maintained at a constant temperature. This content emerged in 1662 at the impulse of Robert Boyle, a theologian, inventor, physicist, philosopher and chemist who is noted as a precursor of modern chemistry. Years […]

Definition of intermolecular forces

Intermolecular forces are interactions that occur between molecules. This phenomenon is conditioned or influenced by the polarity of the groups involved, their nature and the distance, or degree of separation, between the molecules involved. When studying these forces, experts on the subject say, we must not lose sight of […]