Answers

2016-04-12T19:19:22+05:30
X has three electrons more than noble gas configuration 
so,it will form X3-         
formula with sulphate is X₂(SO4)₃
nitrate  is X(NO3)₃
phosphate is XPO4
Carbonate is X₂(CO3)₃
hydroxide is  X(OH)₃
1 5 1