CHEM 120 Review Quiz with complete solution 2025
1. What is a negative control? Group in which no response is expected
2. This is the name of the variable
in a scientific experiment that is Independent Variable
con- trolled by the scientist
3. You have a sample with a mass
of 25 g and a volume of 2.8 ml.
8.9 g/mL
What is the density of this
sample?
4. Which of the below subatomic
par- ticles has the lowest mass? electrons
5. How many valence electrons
are there in an atom of Neon?
8
6. How many pounds (lbs) are in
58 kg?
127.6 lbs
7. Which atom would have an
elec- tron configuration of 1s2
2s2 2p6 3s23p6?
Ar
8. Determine how many electrons
you would expect each of the
following ions and ground state
atoms to contain and match
them up. a. Fluoride= 10
a. Fluoride b. Fluorine= 9
b. Fluorine c. Zn(I)= 29
c. Zn(I) d. Calcium ion= 18
d. Calcium ion
1/
3
1. What is a negative control? Group in which no response is expected
2. This is the name of the variable
in a scientific experiment that is Independent Variable
con- trolled by the scientist
3. You have a sample with a mass
of 25 g and a volume of 2.8 ml.
8.9 g/mL
What is the density of this
sample?
4. Which of the below subatomic
par- ticles has the lowest mass? electrons
5. How many valence electrons
are there in an atom of Neon?
8
6. How many pounds (lbs) are in
58 kg?
127.6 lbs
7. Which atom would have an
elec- tron configuration of 1s2
2s2 2p6 3s23p6?
Ar
8. Determine how many electrons
you would expect each of the
following ions and ground state
atoms to contain and match
them up. a. Fluoride= 10
a. Fluoride b. Fluorine= 9
b. Fluorine c. Zn(I)= 29
c. Zn(I) d. Calcium ion= 18
d. Calcium ion
1/
3
