The Ionization Energy Of Sodium Discussion

The Ionization Energy Of Sodium Discussion
The Ionization Energy Of Sodium Discussion
91. The rate of the passive diffusion of ions across a cell membrane is inversely
proportional to the radius of the ion. Which of the following ions has
the slowest rate of passive diffusion?
(A) F−
(B) K
(C) Ba²
(D) Mg²
92. Many properties of the elements show a general periodic trend.
What is the general trend in the ionization energies of the elements?
(A) Increases to the left and downward
(B) Decreases to the left and downward
(C) Decreases to the left and increases downward
(D) Increases to the left and decreases downward
Bonding and the Periodic Table ❮ 21
93. Why is the second electron affinity of an atom significantly greater
than the first electron affinity?
(A) This makes an electron capture process more likely.
(B) This completes the stable electron configuration.
(C) The second electron is held more tightly than the first.
(D) There is repulsion of like charges.
94. Why is the ionization energy of sodium lower than that of chlorine?
(A) The valence electron of sodium is closer to the nucleus and
experiences a lower effective nuclear charge.
(B) The valence electron of sodium is farther from the nucleus and
experiences a lower effective nuclear charge.
(C) The valence electron of sodium is farther from the nucleus and
experiences a higher effective nuclear charge.
(D) The valence electron of sodium is closer to the nucleus and
experiences a higher effective nuclear charge.
The Ionization Energy Of Sodium Discussion
95. Oxygen molecules will bind to the iron in hemoglobin. When this occurs,
the oxygen molecule is acting as
(A) an oxidizing agent
(B) a Lewis acid
(C) a Lewis base
(D) a reducing agent
96. The BEST way of describing the binding of oxygen to the iron
in hemoglobin is the formation of
(A) a dipole-dipole interaction
(B) an ionic bond
(C) a metallic bond
(D) a coordinate covalent bond
97. The following is a Lewis structure for nitrous acid:
H O N O
What is the correct sequence (left to right) of the formal charges?
(A) 1, −2, 3, −2
(B) 0, 0, 0, 0
(C) 1, −1, 2, −2
(D) −1, −2, 5, −2
22 ❯ McGraw-Hill’s 500 MCAT General Chemistry Questions
98. Referring to the Lewis structure for nitrous acid in the previous question,
what is the correct hybridization (left to right) of the oxygen atoms?
(A) sp³ and sp
(B) sp and sp²
(C) sp³ and sp³
(D) sp³ and sp²
99. Referring to the Lewis structure for nitrous acid in question 97, how do
the lengths of the nitrogen-oxygen bonds compare when nitrous acid loses
a hydrogen ion to form a nitrite ion?
(A) They are equal.
(B) The bond to the oxygen on the left is longer.
(C) The bond to the oxygen on the left is shorter.
(D) The relative lengths are always changing.
The Ionization Energy Of Sodium Discussion
100. The following is the structure of the pyruvate ion:
C C
O
O CH3
– O
The approximate geometry around the carbon atoms bonded to oxygen
(left to right) is
(A) trigonal pyramidal and trigonal planar
(B) trigonal planar and trigonal pyramidal
(C) trigonal planar and trigonal planar
(D) tetrahedral and tetrahedral
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