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BJ Chem Ch 7

BJ Chem Ch 7 Bond Theories & Molecular Geometry

It states that two elements form a bond when they share two unpaired, oppositely spinning electrons. valence bond theory
type of bonding occurring when orbitals overlap on the bond axis-nd to end sigma bond
type of bonding occurring when orbitals overlap side-to-side pi bond
occurs when no one Lewis structure can completely describe the distribution of electrons resonance
it suggests that the orbitals of a molecule's atoms are replaced by totally new orbitals when a molecule forms molecular orbital theory
sp3 - 4 out of 4 tetrahedral
sp3 - 3 out of 4 trigonal planar
can be sp3- 1 out of four, sp- 2 out of 3, sp- 1 out of 2 linear
creation of new orbitals from orbitals of different energies hybridization
sp3- 2 out of 4 bent 109.5
sp2- 2 out of 3 bent 120
bond between two nonmetals of different ENs polar covalent bond
overall polarity of molecule considering orientation of polar bonds dipole moment
Geometry of methane CH4 tetrahedral
Geometry of ammonia NH3 pyrimidal
Geometry of water H20 bent 109.5
Geometry of HF linear
Geometry of BI3 trigonal planar
Geometry of GeF2 bent 120
Geometry of BeF2 linear
Geometry of carbon monoxide CO linear
(T/F) All sublevels hold the same total number of electrons. False
(T/F) A triple bond consists of a single sigma bond and two pi bonds. True
(T/F) The atomospheric pollutant sulfur dioxide (SO2) exhibits resonance, has single and double bonds which can be switched back and forth so rapidly that chemists cannot detect their state. False
Geometry of HCN linear
Geometry of hydroxide ion (OH-) linear
Geometry of boron trihydride (BH3) trigonal planar
How many sigma and pi bonds are there in a molecule of O2 1 sigma and 1 pi due to double bond
How many sigma and pi bonds are there is a molecule of N2 1 sigma and 2 pi bonds due to triple bond
Which shape will always be polar? bent, pyramidal
(T or F) The VSEPR theory predicts the magnetic qualities of diatomic oxygen False
The presence of unpaired electrons in molecular orbitals has been associated with __________. paramagnetism
(Polar or nonpolar) NH3 polar
(T or F) A pi bond is stronger than a sigma bond False
The vector sum of all bond polarities within a molecule dipole moment
Lower case delta + or - represent the partial ___________ of a polar molecule. charges
Draw the Lewis structure for HCN, tell its shape and indicate the direction of the dipole moment. linear
Angle in a pure tetrahedral arrangement 109.5
The difference in ______________ between two elements determines the polarity of the bond between them electronegativity
Draw the Lewis structure for H2O, give it's shape, indicate the direction of the dipole moment bent
Created by: MArCHChemBJ