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CHEM 120 WEEK 8 FINAL EXAM 2
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CHEM 120 WEEK 8 FINAL EXAM 2
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CHEM 120 WEEK 8 FINAL EXAM 2 LATEST VERSIONS ACTUAL EXAM 250QUESTIONS AND CORRECT DETAILED ANSWERS WITH RATIONALES
(VERIFIED ANSWERS) |ALREADY GRADED A+
An atom of which of the following elements has the smallest atomic radius?
a. K
b. P
c. Si
d. Cl
e. Ca - ANSWER: d. Cl
Which element is found in the s-block of the periodic table?
a. Ba
b. Ne
c. Bh
d. Pa
e. None of the above - ANSWER: a. Ba
In general, atomic radii...
a. increase down a group and decrease across a period
b. increase down a group a remain constant across a period
c. decrease down a group and remain constant across a period
d. decrease down a group and increase across a period
e. increase down a group and increase across a period - ANSWER: a. increase down a
group and decrease across a period
Which elements have no affinity for electrons?
a. semiconductors
b. noble gases
c. main group nonmetals
d. transition metals
e. s-block metals - ANSWER: b. noble gases
Which of the following statements is true concerning the electron configuration
[Kr]5p^2
a. This configuration cannot be the ground-state configuration for a Sr atoms
because it violates the Pauli exclusion principle
b. This configuration cannot be the ground-state electron configuration for a Sr atom
because it violates Hund's rule.
c. This configuration cannot be the ground state electron configuration for a Sr atom
because it violates the Aufbau principle
d. This configuration cannot be the ground-state electron configuration for a Sr atom
because it violates the Heisenberg uncertainty principle
, e. This configuration is the ground state electron configuration for a Sr atom -
ANSWER: c. This configuration cannot be the ground state electron configuration for
a Sr atom because it violates the Aufbau principle
At which step of ionization does magnesium exhibit a sudden marked increase in its
ionization energy?
a. 6th
b. 3rd
c. 5th
d. 4th - ANSWER: b. 3rd
At what step of ionization doe aluminum exhibit a sudden marked increase in its
ionization energy?
a. 3rd
b. 4th
c. 6th
d. 5th - ANSWER: b. 4th
Which of the following electron configurations is not allowed?
a. 1s^2 2s^2 2p^5
b. 1s^2 2s^2 2p^4
c. 1s^2 2s^4
d. 1s^2 2s^2 2p^6 3s^2
e. 1s^2 2s^2 2p^6 - ANSWER: c. 1s^2 2s^4
According to the general trend in electron affinities, which group (or family) of
elements tend to form the most stable anions in the gas phase?
a. alkali metals
b. noble gases
c. transition metals
d. alkaline earth metals
e. halogens - ANSWER: e. halogens
Which of the following orbital occupancy designations is incorrect?
a. 4p^8
b. 4p^6
c. 2p^2
d. 3s^2
e. 1s^2 - ANSWER: a. 4p^8
The procedure by which electrons assigned to (or built up into) orbitals is know as
the _______ principle.
a. Aufbau
b. Hund
c. Planck
d. Pauli
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