Download Chemistry 1010: 2nd Sample Exam for Hour Exam 3 (Modules 7A, 7B & 8A) and more Exams Chemistry in PDF only on Docsity!
You should study your test, study your Handbook modules, and review your drill quizzes BEFORE taking this exam.
When taking it you should do so under exam conditions, i.e. alone, using only a calculator and periodic table, and
waiting until you have completely finished before checking your answers.
1: Which of the following is the best Lewis structure for a molecule of H 3
PO
? (8A-5,7,9,10)
A:
O O
O
O
H
H P H
D:
O P = O
O
O
H
H H
B:
O
O = P= O
O
H
H
H
E:
O P O
O
O
H
H H
C:
O O
O O
↕
O = O
O
O
H
H P
P
O
O
H
H
↕
O = O
O
O
H
H P
P
O
H
O
H
↕
H
H
H
H
2: K-TYPE answer format : Mark a if A,B,C are correct; b if A, C; c if B, D; d if D only; e otherwise.
A: An oxygen atom in the ground state would be paramagnetic. (7B-3)
B: F
and Na
are isoelectronic. (7B-7)
C: Two elements with atomic numbers 33 and 51 would probably have similar chemical properties. (7B-4)
D: Atoms with all electrons paired are attracted into magnetic fields. (7B-3)
You should study your test, study your Handbook modules, and review your drill quizzes BEFORE taking this exam.
When taking it you should do so under exam conditions, i.e. alone, using only a calculator and periodic table, and
waiting until you have completely finished before checking your answers.
3: (CHALLENGE) The energy of an electron in a one-electron system can be calculated using the equation
E
Z
n
ergs
n
11 2
2
where E n
= energy of the electron if in the n level
Z = charge on the nucleus of the species
n = level in which the electron exists.
Which of the following correctly states the relationship between the n = 4 and the n = 5 energy levels in the H atom?
(7A-Challenge)
A: E E
4 5
= B: E E
4 5
= C: E E
4 5
= D: E E
4 5
E: E E
4 5
4: Choose the correct statements from the following concerning O 2
and O 2
using K-TYPE answer format : Mark
a if A,B,C are correct; b if A, C; c if B, D; d if D only; e otherwise. (8A-6)
A: The bond in O 2
is stronger than that in O 2
B: The bond in O 2
is shorter than that in O 2
C: There is a double bond in O 2
D: There is a triple bond in O 2
5: Which of the following is the best Lewis structure of NCl 4
? (8A-4,5,7,9,10)
A:
Cl N Cl
Cl
Cl
[^ [
D:
Cl Cl
Cl
N
Cl
[^ [
B:
Cl N Cl
Cl
Cl
[^ [
E:
Cl N Cl
Cl
Cl
[^ [
C:
Cl Cl
Cl Cl
N
N
Cl
Cl
↕
Cl
Cl
[^ [
[^ [
You should study your test, study your Handbook modules, and review your drill quizzes BEFORE taking this exam.
When taking it you should do so under exam conditions, i.e. alone, using only a calculator and periodic table, and
waiting until you have completely finished before checking your answers.
10: Which of the following corresponds to the correct electronic configuration of Ga? (7A-10, 7B-1,2)
A: 1s
2s
2p
3s
3p
4s
3d
4p
B: 1s
2s
2p
3s
3p
4s
3d
4p
C: 1s
2s
2p
3s
3p
4s
3d
4p
D: 1s
2s
2p
3s
3p
4s
3d
4p
E: 1s
2s
2p
3s
3p
3d
4p
11: K-TYPE answer format : Mark a if A,B,C are correct; b if A, C; c if B, D; d if D only; e otherwise. (7B-8)
A: The ionization energy is the energy released when an electron is removed from a gaseous atom or ion.
B: The first ionization energy of Cl is less than that of F.
C: The first ionization energy of B is greater than that of O.
D: The second ionization energy of B is greater than the first ionization energy of B.
12: K-TYPE answer format: Mark a if A,B,C are correct; b if A, C; c if B, D; d if D only; e otherwise. (8A-8)
A: The electronegativity of N is greater than that of Sb.
B: Electronegativity is defined to be the tendency of an atom to attract electrons when bonded to another atom.
C: The formal charge of O in CO 2
is 0.
D: The electronegativity of Sn is greater than that of I.
13: (CHALLENGE) Suppose the universe were different than it is and that the electron spin quantum number could only
have values of +1/2. Assuming that the Pauli Principle still held and that the values of the other quantum numbers
were the same, which atomic numbers would correspond to the "noble gases" (i.e. the elements with special chemical
stability) in this universe?
A: 1, 5, 9, .... B: 2, 10, 18, ... C: 3, 27, 54, .... D: 1, 4, 4, ...
E: none of the previous.
14: Which of the following corresponds to the correct electronic configuration of Cd
? (7A-10, 7B-1,2)
A: 1s
2s
2p
3s
3p
4s
3d
4p
5s
4d
B: 1s
2s
2p
3s
3p
4s
3d
4p
5s
4d
C: 1s
2s
2p
3s
3p
4s
3d
4p
5s
4d
D: 1s
2s
2p
3s
3p
4s
3d
4p
4d
E: 1s
2s
2p
3s
3p
4s
3d
4p
5s
4d
You should study your test, study your Handbook modules, and review your drill quizzes BEFORE taking this exam.
When taking it you should do so under exam conditions, i.e. alone, using only a calculator and periodic table, and
waiting until you have completely finished before checking your answers.
15: K-TYPE answer format: Mark a if A,B,C are correct; b if A, C; c if B, D; d if D only; e otherwise.
A: A 3 s subshell can contain a maximum of 8 electrons. (7A-8,9,10)
B: An element with an electronic configuration of 1s
2s
2p
3s
would be in the same group as beryllium.
(7B-5)
C: The general electronic configuration of the group containing nitrogen is ns
np
. (7B-5)
D: A strontium atom has a filled outer shell if it loses two electrons. (8A-1)
16: K-TYPE answer format : Mark a if A,B,C are correct; b if A, C; c if B, D; d if D only; e otherwise.
A: A bond formed by the sharing of electrons is called a covalent bond. (8A-2)
B: If fluorine and sulfur were to react, the compound which forms would probably be covalent. (8A-2)
C: Molecular covalent substances tend to have low melting points. (8A-2)
D: The formula of the compound which would probably form if sodium reacted with nitrogen would be NaN 2
(8A-3)
