Lecture on Quantum Mechanics and Radioactive Isotopes

A series of flashcards based on lecture notes covering quantum mechanics, atomic structure, and radioactive isotopes.

Quantum mechanical model

A theoretical model describing electrons in groups around the nucleus in different energy shells.

Valence Electrons

Electrons in an atom's outermost occupied energy level, important for predicting an element's properties.

Maximum number of electrons per energy level

Calculated using the formula 2n², where n is the energy level.

Alpha particle (α)

A particle identical to the nucleus of a helium-4 atom, consisting of 2 protons and 2 neutrons.

Beta particle (β)

An electron that is ejected from the nucleus of a radioisotope.

Positron (β+)

A positively charged electron with the same mass as a beta particle.

Gamma particle (γ)

A high energy form of electromagnetic radiation emitted during nuclear decay.

Radioactive isotopes

Atoms that emit nuclear radiation, characterized by changes in their atomic nuclei.

Electron dot structures

Diagrams that represent valence electrons as dots around an atom's symbol.

Electron energy levels

Specific distances from the nucleus where electrons can exist, with varying capacities for electrons.

Isotope

Atoms of the same element that have different numbers of neutrons.

Nuclear change

A process that involves a change to atomic nuclei, usually resulting in the creation of a new element.

Penetrating ability

The capacity of radiation (alpha, beta, gamma) to penetrate materials, with gamma having the highest ability.