UNIT 3 TEST #2 (ADV. CHEM.) - WRITTEN PART
Part 1 - Fill in the following chart.
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|
Name |
Atomic # |
Mass # |
# of no |
# of e- |
# of p+ |
Symbol |
|
1.) |
nitrogen - 14 |
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|
|
|
|
|
|
2.) |
|
30 |
|
35 |
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|
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|
3.) |
|
|
55 |
|
26 |
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|
|
4.) |
|
53 |
|
73 |
|
|
|
|
5.) |
|
22 |
48 |
|
|
|
|
|
6.) |
tungsten - 184 |
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|
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|
|
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|
7.) |
argon - 39 |
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Part 2 - Solve the
following problems. Show your work! Don't forget SF's and units
with your answer!
8.) What is the mass of 4.329 moles of SnO2?
9.) How many atoms are contained in 35.36 grams of potassium?
10.) What is the mass of 9.8 x 1023 molecules of CO2?
11.) Using the
following data, calculate the average atomic mass of neon. Round your answer to one place to the
right of the decimal point.
Neon - 20 has a percent abundance of
90.92 %.
Neon - 21 has a percent abundance of
0.257 %.
Neon - 22 has a percent abundance of
8.82 %.
Part 3 - Answer the
following questions.
12.) Sulfur has an atomic number of 16. What is the mass number of
the isotope of sulfur that contains 18
neutrons?
13.) Phosphorus - 33 has an atomic number of 15. How many neutrons does this isotope have?
14.) Nickel - 60 has an atomic number of 28. How many neutrons does this isotope have?
15.) Carbon - 14 has 8 neutrons. What is the atomic number of carbon - 14?
16.) Silicon - 30 has 14 protons. How many electrons does an atom of silicon - 30 have?
Part 4 - Name the element
(including #) which has...
17.) 1 proton, 1 neutron, 1 electron
18.) 30 neutrons, 26 electrons, 26 protons
19.) 4 neutrons, 3 protons, 3 electrons
20.) 18 electrons, 22 neutrons, 18 protons