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Lewis Structures And 3-D Shapes
Test Description: Review for Bonding Unit Test
Instructions: Answer all questions to get your test result.
1) What is the central atom in NO3
A
3
B
NONE
C
O
D
N
2) What is the shape for H2O
A
trigonal planar
B
water
C
bent
D
trigonal pyramidal
3) What is the shape for CO2
A
trigonal pyramidal
B
trigonal planar
C
linear
D
bent
4) What is the shape for CH4
A
bent
B
linear
C
trigonal pyramidal
D
tetrahedral
5) What are the bonds for C2H4
A
4 C-H bonds; 1 C=C double bond
B
4 C-H bonds; 1 C-C single bond
C
4 C-H bonds; 1 C-C triple bond
D
2 H-H bonds; 2 C-H bonds; 1 C=C double bond
6) What is wrong with the Lewis Structure for H-O-H
A
Should be a double bond between the H and O
B
Should be 1 lone pair of electrons on the O
C
Should be a dot on each hydrogen to represent the valence electron
D
Should be 2 lone pairs of electrons on the O
7) What should the Lewis Structure for N2 look like
A
1 N-N single bond; 3 lone pairs on each Nitrogen atom
B
1 N-N double bond; 2 lone pairs on each Nitrogen atom
C
1 N-N quadruple bond
D
1 N-N triple bond; 1 lone pair on each Nitrogen atom
8) What is the limitation of Lewis Structures
A
Doesn't tell you which atom is the central atom
B
Doesn't tell you the shape of the molecule
C
Doesn't tell you which atom is bonded to which atom
D
Doesn't tell you the number of bonds
9) Which of the following is not a shape of a molecule
A
linear
B
bent
C
crystal lattice
D
tetrahedral
10) Why is C the central atom in CH4
A
C needs 4 electrons, whereas H only needs 1
B
C has a greater atomic mass than H
C
There is only 1 C, while there is 4 H's
D
It has a higher electronegativity
*select an answer for all questions
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