Write the correct formula. Remember, if the compound is ionic, you MUST include charges in the written formula.

Ammonium carbonate (NH₄¹⁺)₂CO₃^2-

Iron (III) hydroxide Fe³⁺(OH^1-)₃

Copper (I) nitrate Cu¹⁺NO₃^1-

Lithium phosphate  Li¹⁺₃PO₄^3-

Aluminum phosphate Al³⁺PO₄^3-

Barium acetate Ba²⁺(C₂H₃O₂^1-)₂

Mercury (I) chromate Hg¹⁺₂CrO₄^2-

Lead (II) nitrite Pb²⁺(NO₂^1-)₂

Sodium sulfite Na¹⁺₂SO₃^2-

Cobalt (II) phosphate Co²⁺₃(PO₄^3-)₂

Aluminum sulfate  Al³⁺₂(SO₄^2-)₃

Magnesium oxide Mg²⁺O^2-

Potassium dichromate K¹⁺₂Cr₂O₇^2-

Nickel (II) chlorate Ni²⁺(ClO₃^1-)₂

Barium iodide Ba²⁺I^1-₂

Chromium (III) oxide Cr³⁺₂O^2-₃

Silver acetate Ag¹⁺C₂H₃O₂^1-

Write the correct compound name.

K₂O₂ potassium peroxide (this is a tricky one....normally, you would think that the O would have a 2- charge.  BUT, as the formula is written, you know that potassium would have a 1+ charge.  So, that means that the O₂ "must" be a polyatomic ion (which it is).

Al₂S₃ aluminum sulfide

Na₃PO₄   sodium phosphate

Hg(HCO₃)₂ mercury (II) bicarbonate

Mg₃(PO₄)₂ magnesium phosphate

Fe(NO₃)₂ iron(II) nitrate

Zn(C₂H₃O₂)₂ zinc acetate (remember, zinc ALWAYS has a +2 charge)

K₂CO₃ potassium carbonate

MgCl₂   magnesium chloride

KCl potassium chloride

BeF₂ beryllium fluoride

AlPO₄ aluminum phosphate

Zn(OH)₂    zinc hydroxide (remember, you MUST have parentheses around multiples of a polyatomic ion)

Sr₃N₂ strontium nitride