Choose the correct word.
The only pure covalent bonds occur between
different
shared
contrast
identical
atoms. Usually there is some polarity (polar covalent bond) in which the electrons are shared, but spend more time with one atom than the other.
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Choose the correct words
Ionic bonds form between
a metal and a nonmetal
two nonmetals. Covalent bonds form between
two nonmetals
a metal and a nonmetal
.