chemistry

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Two ions which have a simlar shape are?



a. CO32- and SO32-

b. OH- and SO32-

c. PO33- and NO3-

d. SO32- and PO33-

e. CO32- and PO33-

I think (a) not sure plez expalin to me

  • chemistry -

    The right answer is b. OH- and SO32-

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