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These rules are
for covalently bonded
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cmpds only (btn 2
or more nonmetals)
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Do not
use them for ionic cmpds.
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1. Count the
total no. of valence electrons
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(the group no. is
equal to the no. of valence
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electrons).
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if the species is
an anion, increase the no. of
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valence electrons
by the charge on the ion
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