MAT E 273 Exam 1 QUESTIONS AND ANSWERS 100%
ACCURATE.
Ionic Bond - ✅✅when atoms lose or gain electrons (strongest typed of bonding)
Covalent bonding - ✅✅electron sharing, close proximity due to orbital overlap, bonding is
directionally dependent
Metallic bonding - ✅✅electron "sea", valence electrons are donated to the bulk material and
are free to move throughout
Name the electronegativity ranges for bonding types - ✅✅x <= 0.4 nonpolar covalent
0.4<=x<=1.7 polar covalent
x>=1.7 ionic
Order from highest to lowest strength bonding types - ✅✅ionic
covalent
metallic
hydrogen
LDF
Keesom
Debye
LDF - ✅✅induced dipole - induced dipole attraction
What is responsible for bonding noble gases - ✅✅LDFs
What is the trend as atom size increases - ✅✅more opportunities for polarization along with
an increased magnitude of attractive dispersion forces
, nonpolar molecule - ✅✅symmetric charge distribution on average over time, temporary
polarizations allow such molecules to bond
As n-alkanes increase carbon chain length what happens to LDFs? - ✅✅an increasing
number of them
Keesom forces - ✅✅Dipole - Dipole Attraction
Polar molecules variation in electronegativity - ✅✅varies by 0.5-2.0
Debye forces - ✅✅Dipole - Induced Dipole Attraction
(between polar and nonpolar molecules)
Hydrogen bonding - ✅✅attraction between a permanently polarized molecule and adjacent
atom with a lone pair of electron on another molecule
(Only with H-N H-O H-N bonds)
What hybridization is graphite? - ✅✅sp2
What hybridization is diamond - ✅✅sp3
What other element(s) can feature sp3 hybridization? - ✅✅Si
Ge
Sn (at temps below 13.2 Celsius)
General trend of increasing bond strength, and increasing geometric requirements (low to high)
- ✅✅Metallic, Covalent, Ionic
Describe bonding in CH4 - ✅✅covalent bonding within the molecule, LDF bonding between
molecules
ACCURATE.
Ionic Bond - ✅✅when atoms lose or gain electrons (strongest typed of bonding)
Covalent bonding - ✅✅electron sharing, close proximity due to orbital overlap, bonding is
directionally dependent
Metallic bonding - ✅✅electron "sea", valence electrons are donated to the bulk material and
are free to move throughout
Name the electronegativity ranges for bonding types - ✅✅x <= 0.4 nonpolar covalent
0.4<=x<=1.7 polar covalent
x>=1.7 ionic
Order from highest to lowest strength bonding types - ✅✅ionic
covalent
metallic
hydrogen
LDF
Keesom
Debye
LDF - ✅✅induced dipole - induced dipole attraction
What is responsible for bonding noble gases - ✅✅LDFs
What is the trend as atom size increases - ✅✅more opportunities for polarization along with
an increased magnitude of attractive dispersion forces
, nonpolar molecule - ✅✅symmetric charge distribution on average over time, temporary
polarizations allow such molecules to bond
As n-alkanes increase carbon chain length what happens to LDFs? - ✅✅an increasing
number of them
Keesom forces - ✅✅Dipole - Dipole Attraction
Polar molecules variation in electronegativity - ✅✅varies by 0.5-2.0
Debye forces - ✅✅Dipole - Induced Dipole Attraction
(between polar and nonpolar molecules)
Hydrogen bonding - ✅✅attraction between a permanently polarized molecule and adjacent
atom with a lone pair of electron on another molecule
(Only with H-N H-O H-N bonds)
What hybridization is graphite? - ✅✅sp2
What hybridization is diamond - ✅✅sp3
What other element(s) can feature sp3 hybridization? - ✅✅Si
Ge
Sn (at temps below 13.2 Celsius)
General trend of increasing bond strength, and increasing geometric requirements (low to high)
- ✅✅Metallic, Covalent, Ionic
Describe bonding in CH4 - ✅✅covalent bonding within the molecule, LDF bonding between
molecules
