Atomic Theory & Bohr Models

Neutron

subatomic particle with no charge found in the nucleus of the atom

Rutherford

gold foil experiment, discovered nucleus

Bohr

gave idea of energy levels

Bohr model

model that shows electrons in circular orbits around nucleus

Thomson

discovered the electron

Dalton

said atom is smallest thing and it can’t be divided

proton

subatomic particle with positive charge, found in the nucleus

electron

subatomic particle with negative charge, outside of nucleus

electron cloud model

model of atom which the electrons are found in regions of probability rather than defined orbits

atomic number

the number of protons in the nucleus of an atom

mass number

the sum of the number of neutrons and protons in an atomic nucleus

Electron Cloud Model

current model of the atom

Reason for an atom having a neutral charge

Equal number of protons and electrons