HgI2 (with the '2' small subscript - ie below the line)
Mercury has two iodides:
Mercury(I) iodide = Hg2I2
Mercury(II) iodide = HgI2
HgI2 is the chemical form of mercury iodide.
Hgl2
Hg2I2
HgI2
HgIO3
iron(II) iodide: FeI2
Sodium iodide has the chemical formula NaI - it is composed from sodium and iodine.
The chemical formula of mercury(II) nitrate is Hg(NO3)2.
Sodium + Iodine ----> Sodium Iodide2 Na + I2 ----> 2 NaI
The chemical formula for copper (I) iodide is CuI, and for copper (II) iodide is CuI2. Copper (I) iodide is the more common of the two.
iron(II) iodide: FeI2
The formula for barium iodide is BaI2. "Barium iodine" is not a recognized chemical entity.
The chemical formula of calcium iodide is CaI2. Written ionically: Ca2+(I-)2 or normally written as CaI2, without ionic charges.
Sodium iodide has the chemical formula NaI - it is composed from sodium and iodine.
The chemical formula of mercury(II) nitrate is Hg(NO3)2.
Sodium + Iodine ----> Sodium Iodide2 Na + I2 ----> 2 NaI
I don't know what the "2" is, but NH4+ is the formula for the ammonium ion. It has a charge of 1+.
The chemical formula for copper (I) iodide is CuI, and for copper (II) iodide is CuI2. Copper (I) iodide is the more common of the two.
Since mercury can be either a 1+ ion called mercury(I), or a 2+ ion called mercury(II), there are two possibilities.Formulaspotassium chloride is KClpotassium iodide is KImercury(I) chloride is HgClmercury(I) iodide is HgImercury(II) chloride is HgCl2mercury(II) iodide is HgCl2Equation with Mercury(I)KCl + HgI --> HgCl + KIEquation with Mercury(II)2KCl + HgI2 --> HgCl2 + 2KI
The products are Mercury(II) iodide and Potassium nitrate
Formula: (Hg2)3(PO4)2
Hg(ClO4)2