CaO, Na2SO4, KClO4, Fe (NO3) 2, Cr (OH) 3.
a. CaO → Ca2+ (Group 2A) + O2- → -2 charge
b. Na2SO4 → Na+ (Group 1A) + SO42- → -2 charge
c. KClO4 → K+ (Group 1A) + ClO4- → -1 charge
Give the charges of the anion in each of the following compounds CaO, Na2SO4, KClO4, Fe (NO3) 2, Cr (OH) 3.
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