Bohr Diagrams
Structure of Atom
History of Atom
Atomic Theory
Miscellaneous
100
How do you determine the number of energy levels in your model?
What is the period?
100
Place where electrons are found
In the electron cloud
100
This 5th century philosopher suggested the universe is made up of atoms but had no scientific evidence.
Who is Democritus
100
The individual who cut a stone in half to try to prove his theory that atoms could not be broken into smaller components.
democritus
100
This is the neutral charged particle in the nucleus
What is a Neutron
200
This the Bohr model for helium.
1 ring with 2 electrons

2 protons and 2 neutrons

200
Protons and neutrons are located here
What is the nucleus
200
This scientist in the early 1800's pictured the atom as a small sphere and called it the billiard ball model.
Who is John Dalton
200
Individual who developed the billiard ball model of the atom.
John Dalton
200
This determines the type of element/atom
What is the number of Protons
300
An atom of argon would have this many valence electrons.
What is 8?
300
3 types of subatomic particles
What are protons, neutrons and electrons
300
The scientist who discovered the electron.
Who is J.J. Thomson
300
These two particles are attracted to one another and help hold the atom together.
What is Protons and Electrons
300
When an object gains electrons (-) it develops a _______ charge
What is Negative
400
How is mass number calculated using the periodic table?
What is the using the atomic mass and rounding to the nearest whole number?
400
The number of protons are equal to this
What electrons
400
This scientist discovered the nucleus?
Who is Rutherford
400
Who discovered the mass of an electron with the oil drop apparatus?
Who is Robert Millikan?
400
In a neutral atom these are equal
What is Protons (+) and Electrons (-)
500
Draw a bohr model of an atom of chlorine.
3 levels with 2,8,7 electrons

17 protons and 18 neutrons

500
The number of this particle can never change in an atom ( if you change it, the type of atom would change)
What are protons
500
This scientist discovered the neutron.
Who is James Chadwick
500
Scientists that contributed to the Modern atomic theory, know as the quantum or electron cloud model of the atom.
Schrodinger and chadwick
500
What was the name of the experiment JJ Thompson?
What is the Cathode ray tube.
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