Ap Chemistry Review Sheet - Winston Churchill High School, 2016-2017 Page 12
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15AP Chemistry
Summer Review
Winston Churchill High School
2016-2017
Short Answer question from previous AP EXAM
11. Use the principles of atomic structure and/or chemical bonding to explain each of the
following. In each part, your answer must include references to both substances.
a. The atomic radius of Li is larger than that of Be.
b. The second ionization energy of K is greater than the second ionization energy
of Ca.
c. The carbon-to-carbon bond energy in C
H
is greater than it is in C
H
.
2
4
2
6
d. The boiling point of Cl
is lower than the boiling point of Br
.
2
2
Atomic Structure Sample problems:
12. Give the symbols for the isotopes of Carbon, nitrogen and uranium and Determine
the number of protons, electrons and neutrons in each isotope.
13. Given the data below determine the average atomic mass
Isotope %
Abundance Isotopic Mass
a. Sb-121 57.25%
120.9038 amu
Sb-123 42.75%
122.0041 amu
b. Ag-107 51.82%
106.90509 amu
Ag-109 48.18%
108.9047 amu
Mole Concept Sample Problems
14. Convert each of the following to moles.
a. 12.64 g NaOH
b. 3.00 x 1024 atoms Au
c. 40.0 L of Ne gas
d. 800. g CaBr2
e. 3.011 x 1022 molecules H2O
f. 6.78 L of Ar gas
15. Do the following
a. Given 0.250 moles of krypton determine
(i) the mass (ii) the number of atoms (iii) the volume at STP
b. Given 0.750 moles of oxygen determine
V. Bonding
*Please do all questions on a separate piece of paper.
*You will need to know about Lewis structures, covalent bonding, shape names, and bond
angles to do these questions.
*For the following questions, draw the Lewis Structure, name the shape, and state the bond
angle.
1. SeCl
2
2. NO
-1
3
3. OF
2
4. BF
3
5. SO
-2
4
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