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15 Cards in this Set
- Front
- Back
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Covalent bonds are formed when 2 atoms:
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Share electrons
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Covalent bonds are formed between:
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Nonmetals
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What are held together by covalent bonds?
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Molecules
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A single covalent bond represents how many shared electrons?
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Two
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In a nonpolar covalent bond, electrons are shared between atoms of:
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The same element, and/or the difference in electronegativity is less that.4
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In a polar covalent bond, electrons are shared between atoms of:
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different elements
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In a polar covalent bond, the electrons are shared
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unequally
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Unequal electron sharing in polar covalent bonds are caused by:
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the atom with the higher electronegativity attracts the electrons more strongly. (Part of the molecule is slightly positive, part is slightly negative)
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Coordinate covalent bonds occur when one of the atoms in a molecule:
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"donates" both electrons that are being shared
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Properties of molecular substances:
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weak bonds, poor conductors of heat and electricity, low melting point and boiling point
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In a polar covalent bond, electrons are shared between atoms of:
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different elements
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In a polar covalent bond, the electrons are shared
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unequally
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Unequal electron sharing in polar covalent bonds are caused by:
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the atom with the higher electronegativity attracts the electrons more strongly. (Part of the molecule is slightly positive, part is slightly negative)
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Coordinate covalent bonds occur when one of the atoms in a molecule:
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"donates" both electrons that are being shared
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Properties of molecular substances:
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weak bonds, poor conductors of heat and electricity, low melting point and boiling point
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