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| 1 | an orbital that applies to the entire molecule | 
 
 
| 2 | a bond angle of 109.5 degrees that results when a central atom forms four bonds directed toward the center of a regular tetrahedron | 
 
 
| 3 | the mixing of several atomic orbitals to form the same total number of equivalent hybrid orbitals | 
 
 
| 4 | a tightly bound group of atoms that behaves as a unit and has a positive or negative charge | 
 
 
| 5 | a pair of valence electrons that is not shared between atoms | 
 
 
| 6 | a molecule in which one side of the molecule is slightly negative and the opposite side is slightly positive | 
 
 
| 7 | 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 | 
 
 
| 8 | a covalent bond between atoms in which the electrons are shared unequally | 
 
 
| 9 | a neutral group of atoms joined together by covalent bonds | 
 
 
| 10 | a molecule that has two poles, or regions, with opposite charges | 
 
 
| 12 | the energy required to break the bond between two covalently bonded atoms | 
 
 
| 17 | a chemical formula of a molecular compound that shows the kinds and numbers of atoms present in a molecule of a compound | 
 
 
| 19 | attractions between molecules caused by the electron motion on one molecule affecting the electron motion on the other through electrical forces | 
 
 
| 24 | 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 | 
 
 
| 25 | a solid in which all of the atoms are covalently bonded to each other | 
 
 
| 27 | a molecular orbital that can be occupied by two electrons of a covalent bond | 
 
 
| 29 | a bond formed by the sharing of electrons between atoms | 
 
 
| 30 | a bond formed when two atomic orbitals combine and form a molecular orbital that is symmetrical around the axis connecting the two atomic nuclei | 
 
 
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