4.3 Exceptions to the Octet Rule
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6 Terms
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what elements follow the octet rule?
most of the common elements in covalent compounds ---carbon, nitrogen, oxygen, and the halogens
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what are the exceptions to the octet rule?
hydrogen, elements in group 3A, and elements in the third row
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why is hydrogen an exception ??
because it accommodates only two electrons in bonding
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why are elements in group 3A an exception?
because they do not have enough valence electrons to form an octet in a neutral molecule
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why are elements in the third row an exception?
these elements have empty d orbitals available to accept electrons and thus they have more than eight electrons around them
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halogens in periodic table
group 7a
Note 
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