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Unit 2 The Atom

Unit 2 Chemistry- The Atom

proton subatomic particle with a positive charge
neutron subatomic particle with no charge
electron subatomic particle with a negative charge
nucleus the central most dense part of an atom
mass number the sum of the number of protons and neutrons of an element
atomic number the number representing the number of protons/electrons of an element
J.J. Thompson created the plum-pudding or chocolate chip cookie model of the atom
Earnest Rutherford performed the gold foil experiment and discovered the nucleus.
Democritus Greek philosopher used the term atomos to describe the atom as indivisible
Aristotle Greek philosopher who said that all matter is made of only 4 elements (earth-wind-fire-water
Created by: mrsocci