WorksheetsReview for Gen. Chem. Fall Final Exam
Total questions: 20
Worksheet time: 10mins
Determine the average atomic mass and which element X is (BE SURE TO INCLUDE UNIT). Then identify the element.
X-63 has an abundance of 70%
X-65 has an abundance of 30%
6,360 amu, No element has a mass this high
859.95 amu, No element has a mass this high
63.6 amu, Copper (Cu)
64.4 amu, Zinc (Zn)
Name the ionic compound NaCl.
Sodium Chlorine
Sodium Chloride
Monosodium Monochloride
Sodium Monochloride
Name the covalent compound H3N
Trihydrogen Mononitride
Hydrogen Mononitride
Trihydrogen Nitride
Hydrogen-3 Nitride
What is the correct ionic formula when Calcium (Ca) bonds with Phosphorus (P)?
CaP
Ca3P2
Ca2P3
PCa
What is the formula for the covalent compound Dicarbon Heptasulfide
C7S2
CS
C2S7
S7C2
How can you determine how many valence electrons an element has?
The row it is in
It's atomic number
It's atomic mass
The column it is in
Which pictures shows the correct lewis dot structure for Nitrogen (N)?
How many neutrons does the isotope Calcium (Ca) - 45 have?
45
20
25
21
Oxygen is a colorless gas, is an example of what?
Physical change
Chemical change
Physical Property
Chemical Property
Plastic melting is an example of what?
Physical Change
Chemical Change
Physical Property
Chemical Property
What type of mixture looks the same throughout?
Heterogeneous
Solution
Miscible
Homogeneous
What type of mixture looks different throughout?
Heterogeneous
Solution
Miscible
Homogeneous
Gold (Au) has a half-life of 2 days. If you start out with 100g, how much is left after 8 days?
12.5 grams
6.25 grams
800 grams
1,600 grams
Use the graph to determine the half-life.
5 seconds
15 seconds
20 seconds
25 seconds
In the compound CF which element is the positive dipole and why?
Carbon (C) is the positive dipole because it is the most electronegative.
Carbon (C) is the positive dipole because it is the least electronegative.
Fluorine (F) is the positive dipole because it is the most electronegative.
Fluorine (F) is the positive dipole because it is the least electronegative.
In the compound CF, which element is the negative dipole and why?
Carbon (C) is the negative dipole because it is the least electronegative.
Carbon (C) is the negative dipole because it is the most electronegative.
Fluorine (F) is the negative dipole because it is the least electronegative.
Fluorine (F) is the negative dipole because it is the most electronegative.
How many sig figs in the number 0.00008700
2
4
8
9
What is the symbol for alpha radiation?
42 He
0-1 e
00 Y
All of the above represent alpha radiation.
How many neutrons does the element Fluorine (F) have?
9
19
18
10
What element is this shell model representing?
Fluorine (F)
Carbon (C)
Oxygen (O)
Hydrogen (H)
