ОПРЕДЕЛИТЕ ЧИСЛО ПОТЕРЯННЫХ ИЛИ ПРИНЯТЫХ ЭЛЕКТРОНОВ

    0    -2   +5   +2   -2   +6    +5   -3

a)X--->X;   X--->X;   X--->X;    X-->X

 

    -2    0    +7    +4   0   -2      +5   0

B) X--->X;   X--->X;   X--->X;    X-->X

 

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