Question 1(Multiple Choice Worth 2 points)
(02.02 LC)

Which statement describes the masses of the particles that make up an atom?

The mass of an electron is much greater than the mass of a neutron.
The mass of a neutron is much greater than the mass of a proton.
The mass of a proton is much greater than the mass of an electron.
The mass of a proton is much greater than the mass of a neutron.
Question 2(Multiple Choice Worth 2 points)
(02.02 MC)

Look at the periodic table box for sulfur.

Box from the periodic table showing properties of sulfur. In the top left is the integer 16. In the middle is a capital letter S with Sulfur written below it. Near the bottom is the number 32.06.

An atom of sulfur has a mass of 33 amu. How many protons and neutrons does the atom have?

16 protons and 17 neutrons
17 protons and 16 neutrons
32 protons and 33 neutrons
33 protons and 32 neutrons
Question 3(Multiple Choice Worth 2 points)
(02.02 LC)

An atom has 9 protons, 10 neutrons, and 9 electrons. What is its mass number?

9
10
19
28
Question 4(Multiple Choice Worth 2 points)
(02.02)

The experiment that shot heavy particles at a thin sheet of gold foil was responsible for leading to the discovery of the

atom.
neutron.
electron.
nucleus.
Question 5(Multiple Choice Worth 2 points)
(02.02)

The neutrons of an atom have charges and are located the nucleus.

negative, inside
no, inside
no, outside
negative, outside
Question 6(Multiple Choice Worth 2 points)
(02.02 LC)

Which statement describes the electrical charges of the particles that make up an atom?

Electrons have a positive charge; protons have a negative charge.
Neutrons have a positive charge; electrons have a negative charge.
Protons have a positive charge; electrons have a negative charge.
Protons have a positive charge; neutrons have a negative charge.
Question 7(Multiple Choice Worth 2 points)
(02.02)

The number of protons in an atom’s nucleus determines its

atomic mass.
number of neutrons.
identity as an element.
total charge as an ion.
Question 8(Multiple Choice Worth 2 points)
(02.02)

An atom of fluorine has an atomic number of 9 and an atomic mass of 19. The atom contains

19 protons, 19 electrons, and 9 neutrons.
19 protons, 10 electrons, and 9 neutrons.
9 protons, 10 electrons, and 10 neutrons.
9 protons, 9 electrons, and 10 neutrons.
Question 9(Multiple Choice Worth 2 points)
(02.02 LC)

Which property of an atom do you need to know in order to identify the element?

Atomic number
Mass number
Number of electrons
Number of neutrons
Question 10(Multiple Choice Worth 2 points)
(02.02 MC)

Look at the diagram of an atom.

Model of an atom. The central region contains seven small circles. Four of the small circles are shaded and three are unshaded with a plus sign in each. The central region is surrounded by two rings. On the inner ring are two small, unshaded circles with a negative sign in each circle. On the outer ring is one small, unshaded circle with a negative sign in it.

What is the atom’s mass number?

3
4
7
10