atom

ATOM

An atom is the smallest constituent unit of ordinary matter that constitutes a chemical element.

Isotopes are variants of a particular chemical element which differ in neutron number, and consequently in nucleon number.

ION: It is an electrically charged particle consisting of an atom or molecule that is not electrically neutral.

ELECTRON CONFIGURATION:In atomic physics and quantum chemistry, the electron configuration is the distribution of electrons of an atom or molecule (or other physical structure) in atomic or molecular orbitals.

Quantum numbers are numbers associated with physical quantities conserved in certain quantum systems. In many systems, the state of the system can be represented by a set of numbers, quantum numbers, which correspond to possible observable values ​​that commute with the Hamiltonian of the system.