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CHM Exam 2 Practice questions
- Course
- Chemistry 121
- Institution
- Harper College
Exam 2 practice questions for chemistry.
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Chem. 100 Exam II (Practice Test)ATOMIC STRUCTURE:
The following information applies to subatomic particles. If the correct answer is Proton, mark
“A,” neutron, mark “B,” electron, mark “C.” If the answer is correct for more than one, mark all
correct answers.
1. The mass of the particle doesn’t weigh enough to worry about.
2. The mass of the particles is 1 a.m.u.
3. This particle is located outside the nucleus.
4. This particle is found only in the nucleus.
5. This particle has a charge of –1.
6. This particle has no charge.
7. This particle has a charge of +1.
1
8. The symbol of this particle is p+ or H.
64
For the following element, 30Zn answer the following questions related to the configuration.
1. The atom contains the following number of shells:
(a) 3 (b) 5 (c) 4
2. For this atom, shell #3 contains the following number of electrons:
(a) 2 (b) 18 (c) 8
3. This atom would have the following # of neutrons (in the nucleus):
(a) 30 (b) 64 (c) 34
4. This atom would have the following # of electrons (total):
(a) 30 (b) 34 (c) 64
5. This atom would have the following # of protons (in the nucleus):
(a) 34 (b) 64 (c) 30
1
, 6. Using the following diagrams, answer these questions: Mark “all” correct answers.
a) b)
P7
P 24 2 8 12 2 2 8
N8
N 36
c) d)
P 6 P 7
N 8 2 4 N 10 2 5
a. Which are isotopes?
b. Which is a metal?
c. Which is a non-metal?
d. Which is an ion?
e. Which are atoms?
f. What is the atomic number of element d?
(a) 7 (b) 18 (c) 17
g. What is mass number of element b?
(a) 8 (b) 10 (c) 15 (d) 25
h. Which element has 4 valence electrons?
7. Draw the electron dot symbols for the following:
a. francium d. CO2
b. iodine e. CH4
c. H2O
8. Tell whether the following compounds are:
(a) covalent (b) salt (c) acid (d) base
a. N2O3 b. NH4C2H3O2 c. SiS2 d. NaHSO4
e. PbI2 f. H2SO3 g. Al(OH)3 h. Co2S3
i. FrOh j. NH4HSO3 k. HI l. SnI4
m. RbOH n. HClO3
2
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