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Atomic Structure

Reviews atomic history and structure

Democritus named particles "atomos"
Dalton developed atomic theory
Thomson discovered electron
Rutherford discovered nucleus
Bohr planetary model
Chadwick discovered neutron
electron cloud (quantum) model current model
nucleus protons and neutrons
protons +1 charge
electrons -1 charge
neutrons 0 charge
atomic mass protons + neutrons
atomic number equal to protons
neutral atom protons = electrons
number of electrons that can fit into first energy level 2
number of electrons that can fit into second energy level 8
valence electrons located in outermost shell/energy level
Bohr diagram shows ALL electrons
Lewis Structure (Dot) diagram shows only VALENCE electrons
did gold foil experiment Rutherford
did cathode ray experiment Thomson
Created by: dfwingfield