Atomic Theory 1
The most accurate model of the atom.
What is Quantum Mechanics?
Electrons have a _______ charge.
Negative
Which scientist first determined that electrons are found outside of the nucleus?
Rutherford
Creator of the Quantum Mechanics Model.
Who is Erwin Schrodinger?
Who discovered the planetary model of the atom?
Bohr
A sphere can be used to represent his atomic theory
Dalton
Dalton stated that atoms of different elements have _________ properties.
Different
Aristotle thought matter was made of these.
What are Earth, wind, fire, and water?
This scientist is credited for the Nuclear Model of the atom.
Who is Rutherford?
What does the Greek word atomos mean?
What is indivisible?
Thomson was the first person to discover...
Atoms have electrons
Thomson
What subatomic particle was discovered by Rutherford?
Proton
Who is Dalton?
This experiment led to the discovery of the electron.
What is cathode ray experiment?
Why did the positively charged alpha particles bounce back in Rutherford's Gold Foil Experiment?
They collided and were repelled by the positively charged nucleus
Where is most of the atom's mass located?
Nucleus
In Bohr's model, orbits are called _______.
Energy levels
There were two major findings of Rutherford's Gold Foil Experiment. Name one.
The atom is mostly empty space
OR
There is a positively charged nucleus
What is the charge on an alpha particle?
+2
What particles make up the nucleus?
Protons and neutrons
This model is named after a British dessert.
What is the Plum Pudding model?
In the cathode ray tube experiment, the electron particles bent toward these plates.
What is the positive plates?
This scientists believed that electrons orbited the nucleus like planets orbit the sun in certain energy levels. He also came up with the Planetary Model of the atom.
Who is Neils Bohr?
What did Rutherford use to bombard the gold foil in his experiment?
Helium atoms, or alpha particles.