Chapters 4 & 5 Review

Question 1

Name three things that are true about Dalton’s atomic theory:

Answer 1

• All elements are composed of atoms.
• Atoms that combine do so in simple whole number ratios.
• Atoms of the same element are identical.

Question 2

Which model of the atom was thought to be true after the discovery of the nucleus by by Rutherford?

Answer 2

Electrons are located around the nucleus and therefore, occupy almost all the volume of the atom.

Question 3

What is the atomic mass of an element?

Answer 3

Weighted average of the masses of the isotopes of an element.

Question 4

In the Bohr model of the atom, an electron in an orbital has a certain, fixed ____.

Answer 4

Energy.

Question 5

The letters in electron configurations indicate what?

Answer 5

The orbital shape.

Question 6

How does the speed of visible light compare with the speed of gamma rays, when both speeds are measured in the same medium?

Answer 6

The speeds are the same.

Question 7

Which color of visible light has the shortest wavelength?

Answer 7

Violet.

Question 8

Emission of light from an atom occurs when an electron ____.

Answer 8

Drops from a higher to a lower energy level.