Unit 3 Bonding Review
Flashcard
•
Chemistry
•
10th Grade
•
Practice Problem
•
Hard
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1.
FLASHCARD QUESTION
Front
What is a lone pair of electrons?
Back
A lone pair of electrons refers to a pair of valence electrons that are not shared with another atom and are localized on a single atom.
2.
FLASHCARD QUESTION
Front
How many lone pairs are present in a trigonal pyramid molecular shape?
Back
1
3.
FLASHCARD QUESTION
Front
What is the formal charge of an atom?
Back
The formal charge of an atom is the charge assigned to it based on the difference between the number of valence electrons it has and the number of electrons it owns in a Lewis structure.
4.
FLASHCARD QUESTION
Front
What is the formal charge on carbon in a neutral molecule?
Back
0
5.
FLASHCARD QUESTION
Front
What determines if a molecule is polar or non-polar?
Back
A molecule is polar if it has a net dipole moment due to the presence of polar bonds and an asymmetrical shape; it is non-polar if the dipoles cancel out due to symmetry.
6.
FLASHCARD QUESTION
Front
Is a molecule with symmetrical shape always non-polar?
Back
Yes, a molecule with a symmetrical shape is typically non-polar because the dipoles cancel each other out.
7.
FLASHCARD QUESTION
Front
What is the shape of a molecule with two bonded atoms and one lone pair on the central atom?
Back
Bent.
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