Midterm Exam 2 Practice
Flashcard
•
Chemistry
•
10th Grade
•
Practice Problem
•
Hard
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16 questions
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1.
FLASHCARD QUESTION
Front
What is the bond angle in a molecule with two lone pairs on the central atom?
Back
around 109.5 degrees
2.
FLASHCARD QUESTION
Front
What electronic geometries can lead to an angular (bent) molecular geometry?
Back
trigonal planar and tetrahedral
3.
FLASHCARD QUESTION
Front
What is Hund's rule?
Back
Hund's rule states that electrons will occupy degenerate orbitals singly before pairing up.
4.
FLASHCARD QUESTION
Front
What is the formal charge on an atom?
Back
The formal charge is the charge an atom would have if all bonding electrons were shared equally.
5.
FLASHCARD QUESTION
Front
What is the formal charge on the Xe atom in XeF₄?
Back
0
6.
FLASHCARD QUESTION
Front
How many lone pairs of electrons are around the central atom in xenon difluoride (XeF₂)?
Back
6
7.
FLASHCARD QUESTION
Front
What is the molecular geometry of a molecule with two lone pairs and two bonded atoms?
Back
Bent or angular.
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