Atoms of the same element can have
different numbers of neutrons; the
different possible versions of the atom
of an element are called isotopes
Written as a symbol and a number i.e.
C 14 is an isotope of carbon called
▪An atom with a positive or
negative charge (temporarily
losing or gaining an electron)
▪Atoms are neutral unless they are
▪Atoms which gain electrons will
have a negative (-) charge and
become negative ions.
▪Atoms which lose electrons will
have a positive (+) charge and
become positive ions.
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