Nickle ions, Ni+3, will bind to oxygen ions, O-2, in a ratio that depends on their charges since the total positive charges in the molecule must equal the total negative charges. The eventual number of positive and negative charges is found by the least common multiple of the charges.
In this instance, the charges are 3 and 2. The least common multiple is 6, so two atoms of the Ni+3 are needed to have a total positivie charge of +6, and three O-2 are needed to have a total negative charge of -6 to provide the electrical balance.
The resulting molecule is Ni2O3.
Mg(NO2)2 is an ionic compound. The formula MG(NO2)2 is the formula for the ionic compound of Magnesium Nitrite trihydrate
The compound is lead sulfide.
Formula: Sn(NO3)2
MgCI2 does not exist. The formula is MgCl2 with a lowercase L. This compound is ionic.
Ca3(PO3)2 is the chemical formula of calcium phosphite.This compound is ionic.
Mg(NO2)2 is an ionic compound. The formula MG(NO2)2 is the formula for the ionic compound of Magnesium Nitrite trihydrate
2 Na +and1 CO3 2-form the ionic compound,Na2CO3======
This chemical formula is Ni(NO3)2.
The compound is lead sulfide.
Formula: Sn(NO3)2
MgCI2 does not exist. The formula is MgCl2 with a lowercase L. This compound is ionic.
Ca3(PO3)2 is the chemical formula of calcium phosphite.This compound is ionic.
Ni(HSO4)2. Im positive
Ca(ClO3)2
The formula unit for the ionic compound made of strontium and sulfur is SrS, called strontium sulfide.
Magnesium nitrate is an ionic compound with the formula Mg(NO3)2.
Ba(OH)2 A solid, I think.