Week 8
1. Select the particle or particles that account
for more than 99.99% of the mass of atoms
other than hydrogen.
A.
B.
C.
D.
Protons only
Electrons only
Protons and neutrons
Electrons and neutrons
2. Which of the following elements has the
fewest total number of electrons?
A.
B.
C.
D.
Nitrogen (N)
Sodium (Na)
Helium (He)
Lead (Pb)
3. Select the best statement about different
isotopes of an element.
A. Same number of protons and same number
of neutrons.
B. Same number of protons but different
number of neutrons.
C. Different number of protons but same
number of neutrons.
D. Different number of protons and different
number of neutrons.
4. An atom of neon (Ne) has 10
protons, 10 neutrons, and 10
electrons. What is the atomic mass of
neon?
A.
B.
C.
D.
0 amu
10 amu
20 amu
30 amu
5. Which statement describes how
hydrogen-1 and hydrogen-2 differ?
A. Hydrogen-2 has more protons than
hydrogen-1
B. Hydrogen-2 has more electrons than
hydrogen-1
C. Hydrogen-2 has a higher atomic number than
hydrogen-1
D. Hydrogen-2 has more neutrons and more
mass than hydrogen-1.
6. Which of the following is an element?
A.
B.
C.
D.
Water
Ozone
Oxygen
Carbon dioxide
7. Which of the following is NOT a
property of most metals?
A.
B.
C.
D.
Solid at room temperature
Have luster
Conduct heat and electricity well
Do not react readily with any other elements
8. How many electrons fit into the
first energy level or shell?
A.
B.
C.
D.
1
2
4
8
9. Which of the following is NOT
true of noble gases?
A. Except for helium, they have 8 electrons in
their outer shell
B. They do not react readily with other
elements
C. They usually exist as ions
D. They are in Group 18 (VIIIA)
10. All of the elements in the
halogen family
A. Need to give up one electron to become
stable
B. Need to gain one electron to become stable
C. Do not react at all with other elements
D. Do not need to gain one electron to become
stable.