1. True or False: The octet rule states that atoms are most stable
when they have eight electrons in their valence shell.
- Answer: True. Rationale: The octet rule is based on the
observation that elements tend to bond in such a way that each
atom has eight electrons in its valence shell, giving it the same
electronic configuration as a noble gas.
2. Fill in the blank: In a Lewis structure, a single line represents a
__________ bond.
- Answer: Single. Rationale: A single line in a Lewis structure
represents a single covalent bond, which is a pair of shared
electrons between two atoms.
3. Multiple Choice: Which of the following molecular geometries
is associated with a central atom that has two lone pairs and two
bonded atoms?
A) Linear
B) Trigonal planar
C) Bent
D) Tetrahedral
- Answer: C) Bent. Rationale: When a central atom has two lone
pairs and two bonded atoms, the molecular geometry is bent or
angular due to the repulsion between the electron pairs.
4. Open-ended: Describe the electron configuration of an ion that
has achieved a pseudo-noble gas configuration.
- Answer: A pseudo-noble gas configuration occurs when an ion
has 18 electrons in its valence shell instead of 8, resembling the
electron configuration of a noble gas from the previous period.
5. True or False: Ionic bonds result from the transfer of electrons
from one atom to another, leading to the formation of oppositely
charged ions.
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