Category #1
What atom is positively charged and has the same mass as the neutron
PROTON
This number can be found if you subtract the protons from the atomic mass
neutrons
Who used the cathode ray to discover the electron
J.J Thomsen *cookie
ELECTRON
Contrast Democritus & Aristotle of their belief about the atom
D- solid, nothing inside
A- focused on Fire, Water, Earth, etc. All things are made up of matter
Who is responsible for the modern atomic theory
John Dalton
The electron is located where in the atom
outside the nucleus
What are the 4 components of the Atomic Theory
All matter is made of atoms
Atoms of the same element are identical:
Compounds are formed by combinations
Chemical reactions are rearrangements
Who used the gold foil experiment to discover that the atom was not completely solid and there was something in the middle
Rutherford
What subatomic particle is responsible for chemical reactions (think energy levels)
Electrons
Who is the father of Chemistry
Antoine Lavoisier
Who is known for the planetary model of atoms and energy levels (think onion)
This number CANNOT change or it will change the atom
Proton
Who used the oil drip experiment to discover the charge of the electron
Milikan