Chemical Bonding
是非題
(1)
(2)
(3)
( ) A cation is always larger than the parent atom.
( ) HF contains an ionic bond.
( ) The XeF2 molecule has four pairs of electrons around Xe atom: 2
bonding pairs and two nonbonding pairs.
( ) The main idea of the VSEPR model is that the structure around a given
atom is determined by maximizing repulsions between electron pairs.
( ) F- is larger than Na+.
( ) Cl- is larger than S2-.
(4)
(5)
(6)
(7)
( ) A molecule shows resonance when more than one Lewis structure can
be drawn for the molecule.
( ) A phosphorus atom needs to lose 3 electrons to achieve a noble gas
(8)
configuration.
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選擇題
(1)
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(2)
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(4)
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(6)
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(9)
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For NO2-, there are (A) two (B) three (C) four (D) five valid Lewis
structures.
Which one obeys the octet rule? (A) BH3 (B) I3- (C) NO (D) CO32Predict the structure of NO3-. (A) Tetrahedral (B) Trigonal planar (C)
Trigonal pyramid (D) T-shaped
Predict the structure of O3. (A) Linear (B) trigonal planar (C) T-shaped
(D) V-shaped
The relative ability of an atom in a molecule to attract shared electrons
to itself is called (A) bond energy (B) electron affinity (C)
electronegativity (D) ionization energy.
Which of the following molecules contain polar covalent bonds? (A) N2
(B) NaCl (C) HF (D) LiF
Which would be expected to have the smallest size? (A) O2- (B) F- (C)
Na+ (D) Mg2+
How many valence electrons does XeF4 possess? (A) 30 (B) 32 (C) 34
(D) 36
Predict the structure of CO2. (A) linear (B) trigonal planar (C) trigonal
pyramidal (D) V-shaped
(10) ( )
(11) ( )
(12) ( )
(13) ( )
(14) ( )
(15) ( )
Predict the structure of ClO3-. (A) tetrahedral (B) trigonal planar (C)
T-shaped (D) trigonal pyramidal
Predict the structure of SO2. (A) Linear (B) trigonal planar (C) T-shaped
(D) V-shaped
Which of the following has ionic bonding? (A) CCl4 (B) HF (C) K2S
(D) N2O3
Chemical bonds formed by the attraction of oppositely charged ions are
called (A) coordinate covalent bonds (B) ionic bonds (C) nonpolar
covalent bonds (D) polar covalent bonds.
Which of the following contains the greatest number of lone pairs of
electrons? (A) Cl2 (B) CO2 (C) HF (D) NH3
(16) ( )
Which of the following species has the same electron configuration as
K+? (A) Al3+ (B) Ar (C) Br- (C) Kr
Which of the following contains only nonpolar bonds? (A) Cl2 (B) CO2
(17) ( )
(18) ( )
(C) HCl (D) OF2
Which is a polar molecule? (A) SF4 (B) SF6 (C) XeF2 (D) XeF4
Which bond is the most polar? (A) Cl-H (B)F-H (C) O-H (D) S-H
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D
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B
問答、計算題
(1)
(1)
Predict the structure for each of the following:
(a) SCN(b) ClO2-
(c) SO42-
(a) linear
(c) tetrahedral
(b) V-shaped