Category «General terms»
Pythagorean theorem
History of iron
Radioactivity
Isotope

Isotope – is a variety of an atom of a chemical element that differs from other isotopes of the same element in the number of neutrons in the nucleus. In other words, all atoms of one element have the same number of protons in the nucleus (which determines its atomic number) but can have different …
Neutron

Neutron – is an elementary particle with no electric charge that is part of the atomic nucleus. History of Neutron Discovery The discovery of the neutron was a significant event in the history of science. Before that time, two main particles of the atom were known: electrons, which have a negative charge and move around …
Proton
Electron
Atom
Superconductor

Superconductor is a material that at very low temperatures (close to absolute zero) has zero electrical resistance and allows electric current to flow without any energy loss. The most well-known superconductor is mercury, which has zero resistance at a temperature of 4.2 K (-268.8 °C). However, due to the instability and toxicity of mercury, its …