UNIT 3 TEST #1 (REG. CHEM.) - WRITTEN PART
Part 1 - Fill in the following chart.
|
|
Name |
Atomic # |
Mass # |
# of no |
# of e- |
# of p+ |
Symbol |
|
1.) |
nitrogen - 14 |
|
|
|
|
|
|
|
2.) |
|
30 |
|
35 |
|
|
|
|
3.) |
|
|
55 |
|
26 |
|
|
|
4.) |
|
53 |
|
73 |
|
|
|
|
5.) |
|
22 |
48 |
|
|
|
|
|
6.) |
tungsten - 184 |
|
|
|
|
|
|
|
7.) |
argon - 39 |
|
|
|
|
|
|
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 tin?
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 %.