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the energy required to break a bond between two covalently bonded atoms.
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a molecular orbital that can be occupied by two electrons of a covalent bond.
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CHEMISTRY- Chapter 8
Covalent Bonding
| Question | Answer |
|---|---|
| the energy required to break a bond between two covalently bonded atoms. | bond dissociation energy |
| a molecular orbital that can be occupied by two electrons of a covalent bond. | bonding orbital |
| a bond formed by the sharing of electrons between atoms. | covalent bond |
| a covalent bond in which one atom contributes both bonding electrons. | coordinate covalent bond |
| a molecule consisting of two atoms. | diatomic molecule |
| a bond in which two atoms share two pairs of electrons. | double covalent bond |
| a compound that is composed of molecules. | molecular compound |
| a chemical formula of a molecular compound that shows the kinds and numbers of atoms present in a molecule of a compound. | molecular formula |
| a neutral group of atoms joined together by covalent bonds. | molecule |
| a solid in which all of the atoms are covalently bonded to each other. | network solid |
| a covalent bond in which the electrons are shared equally by the two atoms. | nonpolar covalent bond |
| a covalent bond between atoms in which the electrons are shared unequally. | polar bond |
| a molecule in which one side of the molecule is slightly negative and the opposite side is slightly positive. | polar molecule |
| a tightly bound group of atoms that behaves as a unit and has a positive or negative charge. | polyatomic ion |
| a bond formed when two atoms share a pair of electrons. | single covalent bond |
| valence-shell electron-pair repulsion theory, molecules adjust their shapes so that valence electron pairs are as far apart as possible. | VSEPR theory |
| molecular compounds tend to have relatively ______ melting and boiling points. | low |
| a molecular formula shows how many _______ of each _______ a molecule contains. | atoms element |
| electron sharing occurs so that atoms attain the configurations of ______ ________. | noble gases |
| in a coordinate covalent bond, the shared electron pair comes from a _______ atom. | single |
| what does a large bond dissociation correspond to? | a strong covalent bond |
| when different atoms bond, the more ___________ atom attracts electrons more strongly and acquires a slightly ___________ charge. | electronegative negative |
| intermolecular attractions are ________ than either an ionic or covalent bond. | weaker |
| melting a network solid requires breaking ________ bonds throughout the solid. | covalent |
| ionic or covalent?MgCl2 | ionic |
| ionic or covalent?Na2S | ionic |
| ionic or covalent?H2O | covalent |
| ionic or covalent?H2S | covalent |
| predict shape and bond angle.SiCl4 | tetrahedral, 109.5 |
| predict shape and bond angle.CO3 2- | trigonal planar, 120 |
| predict shape and bond angle.CCl4 | tetrahedral, 109.5 |
| predict shape and bond angle.SCl2 | angular, 105 |
| the two weakest intermolecular attractions-dispersion interactions and dipole forces. | van der waals forces |
| 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. | hydrogen bonds |
| atoms react by gaining or losing electrons so as to acquire the stable electron structure of a noble gas, usually eight valence electrons. | octet rule |
| a covalent bond in which three pairs of electrons are shared by two atoms. | triple covalent bond |
| the energy required to break a given chemical bond. | bond energy |
| the distance between the nuclei of the two atoms connected by a bond. the distance where the total energy of a diatomic molecule is minimal | bond length |
| energy released when a bond is formed. | potential energy |
| a stable bond typically has _______ potential energy. | high |
| which is most polar?HF, HCl, H2O, HBr | HF |
| ions are always ________. | polar |
| bonds that possess between 5% and 50% ionic character are considered to be _______ ________. | polar covalent |
| a chemical bond between atoms results from the attraction between alectrons and ___________. | protons |
| a covalent bond consists of ___________. | a shared electron pair |
| if two covalently bonded atoms are identical, the bond is identified as _________ _________. | nonpolar covalent |
| a covalent bond in which there is an unequal attraction for the shared electrons is ______. | polar |
| atoms with strong attractions for electrons they share with another atom exhibit _______ ____________. | high electronegativity |
| the greater the electronigitivity difference between two atoms bonded together, the greater the bond's percentage of ________ ___________. | ionic character |
| the electrons involved in the formation of a chemical bond are called _____________. | valence electrons |
| a chemical bond that results from the electrostatic attraction between positive and negative ions is called a(n) __________. | ionic bond |
| if electrons involved in bonding spend most of their time closer to one atom rather than the other, the bond is __________. | polar |
| if a bond's character is more than 50% ionic, then the bond is called a(n) ____________. | ionic bond |
| a bond's character is more than 50% ionic if the electronegativity difference between the two atoms is greater than ______. | 1.7 |
| polar or nonpolar?H2O2 | polar |
| polar or nonpolar?NO2 + | polar |
| in polar bonds, the more electronegative atom... | attracts electrons and gains a slightly negative charge |
| in covalent bonding, atoms attain the configuration of noble gases by... | sharing electrons |
| the name of the bond formed when atoms share three pairs of electrons is... | triple bond |
| when a shared electron pair comes from a single atom, the bond is a... | coordinate covalent bond |
| molecular compounds tend to have relatively... | low melting points and low boiling points |
| polar molecules tend to line up with their negative ends all on one side when... | placed between oppositely charged plates |
| which combination of atoms would most likely produce a covalent bond?K, O /Cu, Se / N, F /Fe, S | N, F |
| which of the following bond types is the weakest?ionic bond /Van der Waals force / covalent bond /hydrogen bond | Van der Waals force |
Created by:
m.sickles04
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