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Science

Atoms,Ion and Nuclear Decay

TermDefinition
Atom Fundamental building block of all materials; it consists of a cluster of protons and neutrons surrounded by a cloud electrons
Atomic Number the number of protons in a nucleus; the atomic number determines what type of atom it is
Compound A pure substance that is made up of two or more different types of atoms chemically joined
Crystal-Lattice A grid-like structure of atoms or ions where particle is bonded to all of its neighboring atos
Element a substance made up of only one type of atom
Isotopes atoms that have the same number of protons but a different number of neutrons in their nucleus
Anion Negatively charged ion
Cation Positively charged ion
Ion an atom that has lost or gained electrons and therefore has an electric charge
Ionic Bond a bond between a cation and an anion due to electrostatic attraction of their opposite charge
Alpha Decay a nuclear reaction in which a nucleus ejects an alpha particle
Alpha Particle a particle made up of two protons and two neutrons, making it identical to a helium nucleus
Beta Decay a form of nuclear reaction in which a beta particle is ejected
Beta Particle a small, negatively charged particle that can be ejected from a nucleus during a nuclear reaction; it is identical to an electron
Nuclear decay when a nucleus undergoes a nuclear reaction and emits radiation
Half-Life the time it take for half the nuclei to decay
Radioisotope an isotope with a nucleus that may undergo a nuclear reaction
Transmutation one element transforming into another
Created by: BronwynJ123
 

 



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