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BJU Chemistry Ch 7

Bob Jones Chemistry - Chapter 7

bent A structural arrangement in which two bonding pairs of electrons and two unshared electron pairs surround a central atom to form a bent shape.
dipole moment The vector sum of the magnitude and direction of the charges in a molecule; a measure of all bond polarities that exist within a molecule.
hybridization The process of forming new kinds of orbitals with equal energies from a combination of orbitals of different energies.
linear A molecular structure in which two areas of electron density surround a central atom to form a straight line.
molecular orbital theory A bonding theory that suggests that atomic orbitals are replaced by totally new orbitals when the atoms bond to form a molecule. Both bonding and antibonding orbitals are linear combinations of the atomic orbitals.
pi ( π) bond A hybrid bond in which atomic orbitals overlap side by side.
polar covalent bond A covalent bond between atoms with different electronegativities, resulting in a molecule that has a partially positive pole and a partially negative pole.
pyramidal A molecular structure in which three bonding pairs of electrons and an unshared electron pair surround a central particle to form a three-sided pyramid.
resonance A molecular property in which some bonds take on an intermediate character rather than oscillate between two different bond regions, such as in benzene.
sigma bond A hybrid bond in which atomic orbitals overlap end to end.
tetrahedral A molecular structure in which four areas of electron density surround a central atom to form a tetrahedron.
trigonal planar A molecular structure in which three areas of electron density surround a central atom to form a Y shape.
valence bond theory The concept that covalent bonds are formed when orbitals of different atoms overlap; also called the localized electron theory.
valence shell electron pair repulsion (VSEPR) theory The theory that electron orbitals in molecules are arranged so that they are as far apart as possible around the central atom because of electron-electron repulsion.
Created by: heidio



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