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Chemistry
Chapter 8 vocab
Question | Answer |
---|---|
VSEPR theory | valence-shell electron-pair repulsion theory; molecules adjust their shapes so that valence electron pairs are as far apart as possible |
Tetrahedral angle | a bond angle of 109.5 that results when a central atom forms four bonds directed toward the center of a regular tetrahedron |
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 |
Dipole | a molecule that has two poles, or regions with opposite charges |
Polar molecule | a molecule in which one side of the molecule is slightly negative and the opposite side is slightly positive |
Dipole interactions | intermolecular forces resulting from the attraction of oppositely charged regions of polar molecules |
Dispersion forces | attractions between molecules caused by the electron motion on one molecule affecting the electron motion on the other through electrical forces |
Hydrogen bonds | attractive forces in which a hydrogen covalently bonded to a very electronegative atom |
Network solids | a solid in which all of the atoms are covalently bonded to each other |
Molecular orbitals | an orbital that applies to the entire molecule |
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 combined 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 |
Hybridization | the mixing of several atomic orbitals to form the same total number of equivalent hybrid orbitals |
Van der Waals forces | the two weakest intermolecular attractions- dispersion interactions and dipole forces |