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NAME:
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PERIOD:
HOMEWORK 3.1
a. pp. 52 - 63
b. Review your notes.
c. Answer the following:
is considered the father of the modern atomic theory.
2. Thomson's work with cathode rays led to the discovery of the
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3. Millikan's
electron.
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4. Describe Thomson's plum pudding model of the atom.
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and the fact
6. List the five principles of Dalton's atomic theory.
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7. Define each ofthe following terms:
atomic number-
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isotope -
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8. Determine the mass number for each of the following:
a. an isotope of zinc having 30 protons and 34 neutrons
b. an isotope of titanium containing 26 neutrons
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9. Complete the following table:
Isotope
Atomic
Number
Mass
Number
32
#
protons
16
electrons
#
neutrons
24
28
#
Zinc - 64
10. Write the isotopic symbol for each of the following isotopes:
a. cesium-132
b. cobalt-59
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11. Name each of the following isotopes:
a. 64Ga
31
b.
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22
c. thulium-163
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d. zinc-70
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NAME: Al4u,<,c
PERIOD:
HOMEWORK 3.2
a. Read pp. 60 - 63
b. Review your notes
c. Answer the following:
1. Calculate the average atomic mass of lithium given the following information:
atomic mass
atomic mass
Lithium-6
Lithium-?
(ec.ca)
=
=
relative abundance = 7.40%
relative abundance = 92.6%
6.02
7.02
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2. Calculate the average atomic mass of sulfur given the following information:
Sulfur-32
Sulfur-33
Sulfur-34
relative abundance = 95.06%
relative abundance = 0.7400%
relative abundance = 4.190%
atomic mass = 31.98
atomic mass = 32.98
atomic mass = 33.98
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3. Calculate the average atomic mass of chromium given the following information:
Chromium-50
Chromium-52
Chromium-53
Chromium-54
atomic
atomic
atomic
atomic
mass = 49.96
mass = 51.96
mass = 52.96
mass = 53.95
relative
relative
relative
relative
It)
a
abundance
abundance
abundance
abundance
4.410%
83.46%
= 9.540%
= 2.610%
=
=
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NAME:
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PERIOD:
HOMEWORK 3.3
Scientific Notation - Calculations
a. Review pp 113 - 116; pp 122 - 130.
b. Review your class notes
c. Answer/ solve the following:
1. Express each of the following numbers in scientific notation, written to three significant figures .
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a. 7241
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d. 541
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b.0.0005519
c.0.721
e. 9,367,421
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2. Express each of the following numbers in normal decimal form.
a. 7.221 x 10.4
b. 4.221
c. 9.71
X
X
105
102
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d. 3.14
X
10.2
e. 1.22 x 10 I
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3. Perform the following calculations and express the answer in the proper number of significant figures:
a. (1.27).;- (5.296)
z: 0,
b. 12.2 + 0.38
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s:
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c. (1.42 x 102 + 1.021 x 103).;. (3.1 x 1O·I)J
d. 32.647 - 32.327.
g. (9.762
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z:
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h. (6.1982 x 104)2
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e. (0.00630) x (2.003) x (200.0);;
f. 5.34 + 9.3 + 6.12
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