CEM 141 EXAM 3 2026 CHEMICAL BONDING AND REACTIONS REVIEW QUESTIONS ANSWERS VERIFIED GUIDE

CEM 141 EXAM 3 2026 CHEMICAL BONDING
AND REACTIONS REVIEW QUESTIONS
ANSWERS VERIFIED GUIDE

◉ in diamond, the bonds between carbons arrange themselves
towards:
Answer: the corners of a 4-sided figure (tetrahedron)


◉ what is the C-C-C bond angle in diamond?
Answer: 109°


◉ what model of bonding is used to explain the bonding in carbon?
Answer: Valence Bond Theory


◉ Valence Bond Theory
Answer: atomic orbitals overlap to form bonds


◉ how are bonds often shown in the valence bond theory?
Answer: as "sticks"


◉ in the Molecular Orbital Theory, atomic orbitals combine to form:

,Answer: an equal # of molecular orbitals


◉ in MO Theory, each orbital can contain up to ____ electrons
Answer: 2


◉ in MO theory, electrons in bonding orbitals
(stabilized/destabilized) the system??
Answer: stabilized


◉ in MO theory, each bond is made up of how many electrons?
Answer: 2 electrons


◉ in MO theory, electrons are localized where?
Answer: the bond


◉ in the Valence Bond Theory, atomic orbitals _____ to form a bond
Answer: overlap


◉ in VB theory, the greater the overlap, the (weaker/stronger) the
bond
Answer: stronger

, ◉ in VB theory, each bond is made up of how many electrons?
Answer: 2 electrons


◉ in VB theory, electrons are localized where?
Answer: the bond


◉ How can carbon form 4 identical bonds in diamond?
Answer: C atom has 4 valence electrons in different types of orbitals


◉ in diamond, the electrons are in what orbitals?
Answer: a filled s orbital and two half-filled p orbitals


◉ carbon uses what for bonding in diamond??
Answer: hybrid orbitals


◉ Hybrid orbitals
Answer:


◉ the # atomic orbitals going in = ???
Answer: # of hybrid orbitals coming out