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Chem 115 Exam 3 Questions with Answers (100% Correct
Answers)
covalent bond Answer: can be formed when the orbitals of two atoms
overlap and are filled with pairs of electrons
greater orbital overlap Answer: stronger and more stable bond
linear Answer: two electron groups (linear) 180 degrees
trigonal planar Answer: three electron groups (trigonal planar or bent)
120 degrees
tetrahedral Answer: four electron groups (tetrahedral, trigonal
pyramidal, or bent) 109.5 degrees
trigonal bipyramidal Answer: five electron groups (trigonal
bipyramidal, seesaw, t-shaped, or linear)
octahedral Answer: six electron groups (octahedral, square pyramidal,
square planar)
double bonds Answer: require one p orbital from each atom
triple bonds Answer: require two p orbitals from each atom
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hybridization Answer: can be determined directly from VSEPR theory
(number of electron groups)
two electron groups Answer: sp hybridization
three electron groups Answer: sp2 hybridization
four electron groups Answer: sp3 hybridization
hybrid orbitals Answer: form when atomic orbitals in the valence shell
of a central atom combine, determined by the number of electrons in
the valence shell
multiple bonds Answer: use electrons in p orbitals to form pi bonds
which reduces the hybridization of the sigma bond
alkanes Answer: a hydrocarbon containing only single covalent bonds
gas Answer: 1-4 carbons
liquid Answer: 5-12 carbons
oil Answer: 14-20 carbons
solid Answer: >20 carbons
isomer Answer: same molecular formula, different bond structure
© 2025 All rights reserved
Chem 115 Exam 3 Questions with Answers (100% Correct
Answers)
covalent bond Answer: can be formed when the orbitals of two atoms
overlap and are filled with pairs of electrons
greater orbital overlap Answer: stronger and more stable bond
linear Answer: two electron groups (linear) 180 degrees
trigonal planar Answer: three electron groups (trigonal planar or bent)
120 degrees
tetrahedral Answer: four electron groups (tetrahedral, trigonal
pyramidal, or bent) 109.5 degrees
trigonal bipyramidal Answer: five electron groups (trigonal
bipyramidal, seesaw, t-shaped, or linear)
octahedral Answer: six electron groups (octahedral, square pyramidal,
square planar)
double bonds Answer: require one p orbital from each atom
triple bonds Answer: require two p orbitals from each atom
© 2025 All rights reserved
, 2
hybridization Answer: can be determined directly from VSEPR theory
(number of electron groups)
two electron groups Answer: sp hybridization
three electron groups Answer: sp2 hybridization
four electron groups Answer: sp3 hybridization
hybrid orbitals Answer: form when atomic orbitals in the valence shell
of a central atom combine, determined by the number of electrons in
the valence shell
multiple bonds Answer: use electrons in p orbitals to form pi bonds
which reduces the hybridization of the sigma bond
alkanes Answer: a hydrocarbon containing only single covalent bonds
gas Answer: 1-4 carbons
liquid Answer: 5-12 carbons
oil Answer: 14-20 carbons
solid Answer: >20 carbons
isomer Answer: same molecular formula, different bond structure
© 2025 All rights reserved
