Atomic Theory Exam Review

Question 1

What were the three main points of Dalton’s atomic theory?

Answer 1

1. Elements consist of indivisible small particles.
2. All atoms are the same element and are identical.
3. Atoms can neither be created nor destroyed.

Question 2

Who discovered the first subatomic particle?

Answer 2

J.J. Thompson

Question 3

How did Thompson discover the first subatomic particle?

Answer 3

Discovered the electron, To test the properties of the particles, Thomson placed two oppositely-charged electric plates around the cathode ray. The cathode ray was deflected away from the negatively-charged electric plate and toward the positively-charged plate. This indicated that the cathode ray was composed of negatively-charged particles.

Question 4

The three main subatomic particles?

Answer 4

Protons, Neutrons, and electrons.

Question 5

What conclusions did rutherford draw from his gold foil experiment?

Answer 5

Discovered the nucleus because the fine beams that he shot at the atom during testing hit something often towards the center of the atom proving an abundance.

Question 6

Bohr Model of Phosphorus

Answer 6

First Level under 2, the rest up to 8.

Question 7

Bohr model for the molecule formed when potassium bonds with chlorine

Answer 7

Bond lone electrons

Question 8

Find the # of protons, neutrons, and electrons of the following…

Question 9

Is it possible for two waves of energy, each with a wavelength of 320nm to have different frequencies? Different amounts of energy?

Question 10

What two conclusions did the study