Molecular Geometry
Terms
Lewis Dot Structures
Calculate Formal Charge
Tips & Steps
100
What is the shape name and bond angles of AX3E1?
Trigonal Pyramidal.
107°
100
Electrons on the outermost shell or energy level
What are valence electrons
100
What is the correct Lewis Structure for C2H6?
100
What number are you trying to be the closest to when calculating formal charge.
0.
100
Which Step is first when drawing Lewis Structures?
Complete the octet for all atoms.
Check to see if there are too many electrons.
Complete the octet for all atoms. (Remember exceptions)
200
What is the shape name and bond angles of AX5?
Trigonal Bipyramidal
120° and 90°
200
A pair of electrons that is not involved in bonding and belongs exclusively to one atom.
What is a lone pair
200
What is the correct Lewis Structure for CCl2F2?
200
Oxygen has 6 valence electrons, 1 lone pair, and 3 bonds; what is its formal charge?
6-2-3=1
200
How many bonds does Beryllium make?
2 bonds.
300
What is the shape name and bond angles of AX6?
Octahedral.
90°
300
One of two or more Lewis Structures for a single molecule that can be drawn to represent a molecule.
What is a resonance structure
300
What compound does this Lewis Structure Represent?
NF3
300
Calculate the charge of C and Cl in CCl4.
C: 4-0-4=0
Cl: 7-6-1=0
300
How many bonds does Boron need?
3 Bonds.
400
What is the shape name and bond angles of AX5E1?
Square Pyramidal.
>90°
400
An electron configuration notation with only the valence electrons of an element shown, indicated by dots placed around the element’s symbol.
What is a Lewis Dot Diagram
400
Which of the following contains the correct Lewis structure of a compound with one Si and four Br atoms?
A:
B:
C:
D:
B:
400
What is the formal charge of C,O, and H?
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C: 4-0-4=0
O: 6-4-2=0
H: 1-0-1=0
400
What do you do if you draw your Lewis Structure and there are too many electrons?
Make double and triple bonds.
500
What is the shape name and bond angles of AX3E2?
T-Shaped.
90° and 180°
500
What is an isomer?
Two or more compounds with the same formula but a different arrangement of atoms in the molecule and different properties.
500
What are the three resonance structures for CO32-?
500
What is the equation for finding the Formal Charge of an atom?
500
What do you do if you draw your Lewis Structure and there are too few electrons?
Make an expanded octet.