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Chemistry Vocab 8

TermDefinition
Bonding Orbital A molecular orbital that can be occupied by two electrons of a covalent bond.
Sigma Bond A bond formed when two atomic orbitals combine for form a molecular orbital that is symmetrical around the axis connecting the two atomic nuclei.
Pi Bond A covalent bond in which the bonding electrons are most likely to be found in sausage-shaped regions above and below the bond axis of the bonded atoms.
Tetrahedral Angle A bond angle of 109.5 degrees that results when a central atom forms four bonds directed toward the center of a regular tetrahedron.
VSEPR Theory Valence shell electron pair repulsion theory, because electron pairs repel, molecules adjust their shapes so that valence electrons are as far apart as possible.
Hybridization The mixing of several atomic orbitals to form the same total number of equivalent hybrid orbitals.
Nonpolar Covalent Bond A covalent bond in which the electrons are shared equally by the two atoms.
Polar Covalent Bond A covalent bond between atoms in which the electrons are shared unequally.
Polar Bond A covalent bond between atoms in which the electrons are shared unequally.
Polar Molecule A molecule in which one side of the molecule is slightly negative and the opposite side is slightly positive.
Dipole A molecule that has two poles, or regions, with opposite charges.
Van Der Waals Force The two weakest intermolecular attractions- dispersion interactions and dipole forces.
Dipole Interaction Intermolecular forces resulting from the attraction of oppositely charged regions of polar molecules.
Dispersion Force Attractions between molecules caused by the electron motion on one molecule affecting the electron motion on the other through electrical forces; thes are the weakest interactions between molecules.
Hydrogen Bond Attractive forces in which a hydrogen covalently bonded to a very electronegative atom is also weakly bonded to an unshared electron pair of another electronegative atom.
Network Solid A solid in which all of the atoms are covalently bonded to each other.
Created by: OliviaRoark
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