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Most objects contain the same number
of protons and electrons and, therefore,
have the same number of positive (+)
and negative (-) charges. Since a
positive charge is the electrical opposite
of a negative charge, equal numbers of
positive and negative charges offset
each other. As a result, most objects
behave as if they have no charge at all.
Scientists say these objects are neutral
(like uncombed hair).
But if a neutral object loses electrons,
then it will have more protons and will
have become positively charged. If a
neutral object gains electrons, then it
will have become negatively charged.
Do you understand all that? Then letís see if you can identify the charge on each object pictured. Check your answers on the inside back cover.