What is Each of the 4 oxygen atoms has 3 unshared pairs of valence electrons and a single bond to a central phosphorous.
400
Calcium + Permanganate
What is Ca(MnO4)2
400
Magnesium + Chlorate
What is Mg(ClO3)2
500
CN -1
What is Cyanide Ion
500
Chromate Ion
What is CrO4 -2
500
Chlorate Ion
What is A central oxygen with 1 unshared pair of valence electrons has a single bond with the two other oxygens (with 3 unshared pairs of valence electrons each) and a single bond to a chlorine atom with 3 unshared pairs of electrons.