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13 Dec 2019

The greater acidity of terminal alkynes as compared with alkanes is primarily attributed toa) the greater electronegativity of sp hybridized carbons compared to sp3 hybridized carbonsb) the lower electronegativity of sp hybridized carbons compared to sp3 hybridized carbonsc) the pi electrons stabilizing the negative charged) the pi electrons destabilizing the negative charge

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Casey DurganLv2

17 Dec 2019

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Show transcribed image text LTIPLE CHOICE. Choose the one alternative that best completes the statement or answers th tion. 1) 1) How many lone pairs are on the Br atom in BrF2-? D) 3 A) 1 B) 0 C) 2 2) 2) Based on VSEPR theory, which should have the smallest XAX bond angle? D) A) B) C)
5) Arrange in order from the smallest to the largest bond angle: CH3+, NF3, NH4+, XeF4. 5) A) XeF4, NH4+, NF3, CH3+ C) NF3, NH4+, XeF4, CH3+ B) XeF4, NF3, NH4+, CH3+ D) CH3+, NF3, NH4+, XeF4
11) What is the bond angle in the following molecular model of NO2-? A) less than 109.5 B) 109.5 C) less than 120Â° but greater than 109.5 D) 120Â° 12) 12) What are the bond angles in the folowing molecular model of SO32-? ao A) less than 109.5 B) 109.5Â° C) less than 120Â° but greater than 109.5 D) 120 13) 13) How many of the following molecules are polar? B) 0 D) 3 E) 1 A) 2 14 14) Determine the electron geometry (eg, molecular geometry (mg. and polarity of Pa A) eg-trigonal pyramidal mg-trigonal pyramidal polar B) eg-tetrahedral mg-bent, polar C) eg-tetrahedral, mg-trigonal pyramidal polar D) eg-linear, mg-linear, nompolar E) eg-trigonal planar, mg-trigonal planar, nonpolar 15) Which orbital hybridization is associated with a tetrahedral charge cloud arrangement? 15)__ B) sp3 D) None of these C) sp 16) Which of the following is not true? 16 A) An sp3 hybrid orbital may hold a lone pair of electrons B) An sp3 hybrid orbital may form a pi bond by overlap with an orbital on another atom. C) An sp3 hybrid orbital may form a sigma bond by overlap with an orbital on another atom. D) The sp3 hybrid orbitals are degenerate.
chlo 17) What orbital hybridization is expected for the central atom in a molecule with a trigonal 17)_ planar geometry? A) sp2 C) sp B) sp3 D) None of these 18) Which atomic orbitals are involved in bonding and which as lone pair orbitals for 18) N2H2? H N N-H A) boading: s on H, sp2 and p on N B) bonding: s on H, sp2 on N C) bonding: sp2 on both H and N D) bonding: s on H, p on N lone pair: sp2 on N lone pair: p on N lone pair: p on N lone pair: sp2 on N 19) Place the following in order of increasing dipole moment 20) Give the hybridization for the O in OF2 21) Give the hybridization for the Br in BrCl3 22) Give the hybridization for the C in HCCH A)sp 20) E) sp3 Ð)sp3d 21) D) sp E)sp3 A)sp3 B) sp3d2 C) sp 22) D) sp3d E)sp2
23) Identify the set of hybrid orbitals shown below. A) sp C) sp3 B) sp2 D) None of these 24) Which molecule has a central atom that uses the set of hybrid orbitals shown below to form bonds 24) with the non-central atoms? A) NO2 B) H20 C) co2

1)The NaCl2 ionic salt does not exist. Which of the followingstatements best explains why?

A. Because the formation of Na2+ is an unfavorable process due tothe great amount of energy required to remove the 2nd electron fromthe Na atom (the 2nd electron would have to be removed from thecore electrons of the Na atom).
B. Because the Cl- anion is too large for there to be two of themattached to one Na+ ion.
C. Because NaCl2 is actually a polyatomic ion with a -1 charge, andnot an ionic salt. In the presence of another Na+ ion, the Na2Cl2salt would form.
D. Because Cl2 has no charge and therefore would not be attractedelectrostatically to the positively charged Na2+ cation.

2)Select the false statement below.

A. The first ionization energy of an atom is smaller than thesecond ionization energy of the same atom.
B. Phosphorus has a greater first ionization energy than magnesium,and the reason for this is because P has a greater effectivenuclear charge (Zeff) than Mg.
C. The following process is an endothermic process and representsthe first ionization energy of an atom A:A(g) ? A1+(g) + e1-
D. Fluorine has a greater first ionization energy than iodine, andthe reason for this is because fluorine has a greater amount ofshielding of outer electrons by inner electrons than doesiodine.

3)The Group 5A elements N,P,As have lower (less negative) electronaffinities than most of the Group 4A or Group 6A elements becauseN,P,As have half-filled subshells.

True
False

4)A fluorine atom is smaller than a bromine atom, and a potassiumatom is larger than a lithium atom.

True
False

5)A certain main-group element exhibits the following successiveionization energies in kJ/mol:

IE1 = 100; IE2 = 1200; IE3 = 2300; IE4 = 3100; IE5 = 4200

Select the false statement about this element below.

A. This is likely a Group 1A element.
B. This element is typically found uncombined in nature (that is,it is not usually found in compounds, but rather as a freeelement).
C. If this element is given a symbol of "J", it would form an ioniccompound with sulfur as J2S.
D. If this element was in period 2 of the periodic table, it wouldbe lithium.

6)Select the false statement below.

A. Generally speaking, non-metallic elements have greater effectivenuclear charge (Zeff) than metallic elements in the sameperiod.
B. Generally speaking, as you go down a group in the periodictable, there is successively greater shielding of the outer-shellelectrons by the inner-shell electrons.
C. Generally speaking, the heavier alkali metals can be predictedto exhibit greater shielding of the outer-shell electrons by theinner-shell electrons than lighter alkali metals.
D. Generally speaking, as you go across a period in the periodictable, the effective nuclear charge (Zeff) decreases because eachsuccessive element contains more protons in the nucleus than theprevious element and the outer electrons are all in the same shellas you go across a period.

7)Place the following in order of increasing size:

O2-, F1-, Li1+

A. F1- < Li1+ < O2-
B. Li1+ < O2- < F1-
C. Li1+ < F1- < O2-
D. F1- < O2- < Li1+

8)Select the false statement below.

A. The following set of quantum numbers is allowed:
n = 4, l = 2, ml = -2, ms = +1/2
B. The n = 1 shell of any given atom can accomodate up to 2electrons.
C. The n = 4 shell of any given atom can accomodate up to 16electrons.
D. In any given atom, the l = 2 subshell can accomodate up to 5electrons that have negative spins (ms =

redgoldfish403

Question 1 of 15 (worth 2 points)
The NaCl2 ionic salt does not exist. Which of the followingstatements best explains why?

A. Because the formation of Na2+ is an unfavorable process due tothe great amount of energy required to remove the 2nd electron fromthe Na atom (the 2nd electron would have to be removed from thecore electrons of the Na atom).
B. Because Cl2 has no charge and therefore would not be attractedelectrostatically to the positively charged Na2+ cation.
C. Because NaCl2 is actually a polyatomic ion with a -1 charge, andnot an ionic salt. In the presence of another Na+ ion, the Na2Cl2salt would form.
D. Because the Cl- anion is too large for there to be two of themattached to one Na+ ion.
Review
Check to review before finishing (will be flagged in Table ofContents)
Question 2 of 15 (worth 2 points)
Select the false statement below.

A. Fluorine has a greater first ionization energy than iodine, andthe reason for this is because fluorine has a greater amount ofshielding of outer electrons by inner electrons than doesiodine.
B. The following process is an endothermic process and representsthe first ionization energy of an atom A:
A(g) ? A1+(g) + e1-

C. Phosphorus has a greater first ionization energy than magnesium,and the reason for this is because P has a greater effectivenuclear charge (Zeff) than Mg.
D. The first ionization energy of an atom is smaller than thesecond ionization energy of the same atom.
Review
Check to review before finishing (will be flagged in Table ofContents)
Question 3 of 15 (worth 2 points)
The following process represents the first electron affinity of anatom A:

A(g) ? A1+(g) + e1-

True
False
Review
Check to review before finishing (will be flagged in Table ofContents)
Question 4 of 15 (worth 2 points)
Generally speaking, most nonmetal atoms are smaller than most metalatoms.

True
False
Review
Check to review before finishing (will be flagged in Table ofContents)
Question 5 of 15 (worth 2 points)
A certain main-group element exhibits the following successiveionization energies in kJ/mol:

IE1 = 100; IE2 = 1200; IE3 = 2300; IE4 = 3100; IE5 = 4200

Select the false statement about this element below.

A. If this element is given a symbol of "J", it would form an ioniccompound with sulfur as J2S.
B. This element is typically found uncombined in nature (that is,it is not usually found in compounds, but rather as a freeelement).
C. This is likely a Group 1A element.
D. If this element was in period 2 of the periodic table, it wouldbe lithium.
Review
Check to review before finishing (will be flagged in Table ofContents)
Question 6 of 15 (worth 2 points)
Select the false statement below.

A. Generally speaking, as you go down a group in the periodictable, there is successively greater shielding of the outer-shellelectrons by the inner-shell electrons.
B. Generally speaking, non-metallic elements have greater effectivenuclear charge (Zeff) than metallic elements in the sameperiod.
C. Generally speaking, the heavier alkali metals can be predictedto exhibit greater shielding of the outer-shell electrons by theinner-shell electrons than lighter alkali metals.
D. Generally speaking, as you go across a period in the periodictable, the effective nuclear charge (Zeff) decreases because eachsuccessive element contains more protons in the nucleus than theprevious element and the outer electrons are all in the same shellas you go across a period.
Review
Check to review before finishing (will be flagged in Table ofContents)
Question 7 of 15 (worth 2 points)
Place the following in order of increasing size:

O2-, F1-, Li1+

A. F1- < O2- < Li1+
B. F1- < Li1+ < O2-
C. Li1+ < O2- < F1-
D. Li1+ < F1- < O2-
Review
Check to review before finishing (will be flagged in Table ofContents)
Question 8 of 15 (worth 2 points)
Select the false statement below.

A. The n = 4 shell of any given atom can accomodate up to 16electrons.
B. In any given atom, the l = 2 subshell can accomodate up to 5electrons that have negative spins (ms =

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