Founding Firsts
What subatomic particle was discovered 1st?
Electron
This person created the fist model of an atom that showed electrons organized in energy levels.
Bohr
de Broglie's work concluded that electrons act as both ________ & ________.
Particles & Waves
What subatomic particle was discovered last
Neutron
This scientist's principle states that “Electron’s position and momentum cannot be known simultaneously”
Heisenberg
What did John Dalton create?
What truth about atoms did Rutherford's discovery of the nucleus reveal?
Atoms are mostly empty space.
This person used an oil drop experiment to calculate the charge of an electron.
Millikin
What experiment did Rutherford run that determined the existence of a small, positively charged nucleus?
Gold Foil Experiment
What part(s) of Dalton's atomic theory has been found to be false?
Atoms are indivisible
All atoms of the same element are identical.
The machine this person developed gave us a much better understanding of isotopes.
Besides devising a thought experiment to poison a cat, Schrodinger also was responsible for creating what?
The quantum model of the atom
Cathode Ray Tube Experiment
These two ancient scientists both came up with the idea of atoms independently of each other.
Democritus and Kanada
How did Moseley's discovery change the field of chemistry.
Atomic numbers better organized the periodic table.