Writing formulas with Polyatomic Ions

POLYATOMIC ION IS AN ION MADE UP OF TWO OR MORE ATOMS BONDED TOGETHER THAT ACTS AS A SINGLE UNIT WITH A NET CHARGE. OH^- , CORRESPONDS TO THE POLY ATOMIC ION _____________________.

• hydoxide

• hydrogen

• hydrous

• hydrate

The chemical name for (NH₄)₃PO₄ is ________________.

• ammonium phosphate

• ammonium phosphite

• ammonium phosphide

• ammonium phosphorus.

The chemical formula for calcium hydroxide is --- __________________

• Ca (OH)₂

• CaO

• CaOH

• Ca₂O

Na₂CO_{3 is the chemical formula for _____________.}

• sodium carbonate

• sodium carbonite

• sodium carbon

• sodium carbonide

Magnesium phosphate has a chemical formula __________.

• Mg₃(PO₄)₂

• Mg(PO₄)₂

• Mg(PO₃)₄

• MgPO₄

NH₄ ⁺  and  OH ^-

• NH(OH)₄
• NH₄OH
• OHNH₄
• correct answer not given

Cu ⁺²  and  OH ^-

• CuOH₂
• Cu₂OH
• Cu(OH)₂
• correct answer is not given

Fe ⁺²  and  SO₄ ^-2

• FeSO₄
• Fe₄(SO₄)₂
• FeSO₂
• correct answer is not given

Cr ⁺³ and CO₃^-2

• Cr₃(CO₃)₂

• CrCO₃

• Cr₂CO₃₃

• Cr₂(CO₃)₃

Fe ⁺²  and  SO₄ -2

• Fe₂(SO₄)₂
• FeSO₄
• SO₄Fe
• correct answer is not given