Experimentally
This scientist conducted the Cathode Tube Experiment
JJ Thomson
This scientist developed the Uncertainty Princpiple
Werner Heisenberg
This model stated that most of an atom is empty space.
The nuclear model
Who discovered the neutron?
James Chadwick- a former student of Ernest Rutherford
This ancient Greek philosopher didn't like the idea of the Gods creating "nothing" and so he dismissed the first attempt at atomic theory.
Aristotle
This is the experiment that Ernest Rutherford conducted that showed the existence of a positively charged nucleus.
Gold Foil Experiment
This scientist developed the Plum Pudding Model
JJ Thomson
What was smeared or a cloud in the Plum Pudding Model?
JJ Thomson discovered the first subatomic particle. What experiment led to this discovery?
The Cathode Tube/Ray Experiment
Who invented the field of particle physics when he drilled a channel halfway into a lead block and deposited radioactive material in it?
Rutherford
Line spectra are what inspired this scientist to develop a new atomic model.
This scientist developed the planetary model of the atom.
Ernest Rutherford
In the Quantum Mechanical Model, where do we find electrons?
In orbitals, otherwise known as areas of probability.
In the Gold Foil Experiment, how did Rutherford know the charge of the nucleus?
The nucleus deflected the alpha particles, which have a positive charge. Therefore they must have a positive charge.
What is the name of John Dalton's atomic theory?
the Hard Sphere Model
The difficulty in predicting any spectral lines for systems larger than 1 electron led to these scientists to develop the "Wave Mechanical" Model.
You only need to list one of the three.
de Broglie (all matter has wavelengths)
Heisenberg (Uncertainty Principle) or
Schrodinger (Wavefunction- the mathematical formula for the electrons)
This scientist resurrected the concept of the atom.
John Dalton
In Democritus's atomos theory, what did the atomos look like?
The atomos looked like the properties of the substance- sharp for salt, strong hooks for iron.
What experiment, performed by Milliken, led to the determination of both the charge on an electron and its mass.
The Oil Drop Experiment
This scientist believed the vast majority of an atom was empty space.
Rutherford
What experiment did John Dalton perform before coming up with the atomic theory?
NONE
This scientist proposed the nuclear model.
Ernest Rutherford
Where do we find electrons in Niels Bohr's model?
In orbits around the nucleus.
What are the charges on the electron, the proton, and the neutron?
negative, positive, and neutral
What is the difference between an orbit and an orbital?
orbit- set path
orbital- an area of probability of finding an electron