JECA Chemistry Chapter 16 Vocabulary
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| molecular orbital with an enery that is higher than that of the atomic orbitals from which it is formed | Antibonding orbital
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| the amount of energy required to break a covalent bond between atoms; this value is usually expressed in kJ per mol of substance | Bond dissociation energy
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| molecular orbital whose energy is lower than that of the atomic orbitals from which it is formed | Bonding orbital
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| a covalent bond formed when one atom contributes both bonding electrons | Coordinate covalent bond
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| a substance that is weakly repelled by a magnetic field | Diamagnetic
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| a molecule that has two elecrically charged regions or poles | Dipole
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| a weak intermolecular force resulting from the attraction of oppositely charged regions of polar molecules | Dipole interaction
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| the weakest kind of intermolecular attraction; this attraction is thought to be caused by the motion of electrons | Dispersion force
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| a covalent bond is which two pairs of electrons are shared by two atoms | Double covalent bond
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| process in which several atomic orbitals mix to form the same number of equivalent hybrid orbitals | Hybridization
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| relatively strong intermolecular force in which a hydrogen atom that is covalently bonded to a very electronegative atom is also weakly bonded to an unshared electron pair of another electronegative atom in the same molecule or one nearby | Hydrogen bond
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| an orbit resulting from the overlapping of atomic orbitals when two atoms combine | Molecular orbit
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| substance in which all of the atomes are covalently bonded to eachother | Network solid
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| bond formed when the atoms in a molecule are alike and the bonding electrons are shared equally | Nonpolar covalent bond
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| a term used to describe a substance that shows a relatively strong attraction to an external magnetic field; these substances have molecules containing one of more unpaired electrons | Paramagnetic
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| a bond in which the bonding electrons are most likely to be found in the sausage-shaped regions above and below the nuclei of the bonded atoms | Pi bond
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| a bond formed when two diffrent atoms are joined by a covalent bond and the bonding elecrons are shared unequally | Polar bond
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| a bond formed when two diffrent atoms are joined by a covalent bond and the bonding elecrons are shared unequally | Polar covalent bond
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| a molecule,like water, in which one or more atoms is slightly negative and one or more is slightly positive, unless molecular geometry causes the polarities to cancel each other out | Polar molecule
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| one of two or more equally valid electron dot structures for a molecule or polyatomic ion; the actual bonding is a hybrid, or mixture of the resonance structures | Resonance structure
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| a bond formed when two atomic orbitals combine to form a molecular orbital that is symmertrical along the axis connecting the two atomic nuclei | Sigma bond
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| a bond formed when a pair of electrons is shared between two atoms | Single covalent bond
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| chemical formula that shows the arrangement of atoms in a molecule or a polyatomic ion; each dash between two atoms indicates a pair of shared electrons | Structural formula
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| a bond angle of 109.5 degrees created when a central atom forms four bonds directed toward the corners of a regular tetrahedron | Tetrahedral angle
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| covalent bond in which three pairs of electrons are shared by two atoms | Triple covalent bond
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| a pair of valence electrons that is not involved in bonding | Unshared pair
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| a term used to describe the weakest intermolecular attractions; these include dispersion forces and dipole interactions | Van der Waals force
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| valence-shell electron-pair repulsion theory: because electron pairs repel, molecules adjust thier shapes so that valence-electron pairs are as far apart as possible | VSEPR theory
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