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WorksheetsAP Chemistry Molecular Bonding and Shapes
Total questions: 15
Worksheet time: 16mins
The Lewis structure of the CO32- ion is
The Lewis structure of N2H2 shows __________.
a nitrogen-nitrogen triple bond
a nitrogen-nitrogen single bond
each nitrogen has one lone pair
each nitrogen has two lone pairs
each hydrogen has one lone pair
In the nitrite ion (NO2-), __________.
both bonds are single bonds
both bonds are double bonds
both bonds are the same because of resonance
there are 20 valence electrons
there is one single and one double bond
Resonance structures differ by __________.
number and placement of electrons
number of electrons only
placement of atoms only
number of atoms only
placement of electrons only
A valid Lewis structure of _______ cannot be drawn without violating the octet rule.
NF3
IF3
PF3
SbF3
SO42-
Which atom can accommodate an octet of electrons, but doesn't necessarily have to accommodate an octet?
N
C
H
O
B
Bond enthalpy is __________.
always negative
always positive
sometimes positive and sometimes negative
always zero
unpredictable
As the number of covalent bonds between two atoms increases, the distance between the atoms ______ and the strength of the bond between them ______.
increases, increases
decreases, decreases
increases, decreases
decreases, increases
is unpredictable
Of the possible bonds between carbon atoms (single, double, and triple), _____.
a triple bond is longer than a single bond
a double bond is stronger than a triple bond
a single bond is stronger than a triple bond
a double bond is longer than a triple bond
a single bond is stronger than a double bond
The ability of an atom in a molecule to attract electrons is best quantified by the ______.
electronegativity
paramagnetism
diamagnetism
electron change-to-mass ratio
first ionization energy
The ion NO- has _____ valence electrons.
10
12
14
15
16
The formal charge on carbon in the molecule shown is _______.
0
+1
+2
+3
-1
In the Lewis structure of ClF, the formal charge on Cl is _______ and the formal charge on F is _______.
0,0
-1, -1
0, -1
-1, 0
+1, -1
In the resonance form of ozone shown, the formal charge on the central oxygen atom is _______.
0
+1
-1
+2
-2
Using the table of average bond energies below, the ΔH for the reaction is _____ kJ.
+160
-160
-217
+217
-63
