Chemistry Extracurricular First Semester

What is the NAME of Na₂S?

• sodium (II) sulfide

• sodium sulfide

• disodium sulfide

• sodium sulfur

What is the NAME of Mg₃N₂?

• magnesium (III) nitride

• magnesium (II) nitride

• magnesium nitride

• magnesium (II) nitrogen

What is the FORMULA for calcium arsenide?

• Ca₃As₂

• Ca₂As₃

• CaAs₂

• Ca₃Ar₂

The name of the compound NH₄F is

• Nitrogen hydrogen fluorine

• Ammonia Fluoride

• Nitrogen tetrahydride fluoride

• Ammonium Fluoride

The name of Al₂(SO₄)₃ is

• aluminum sulfur oxide

• aluminum sulfate

• aluminum trisulfate

• aluminum (III) sulfate

The name of Ca₃(PO₄)₂ is

• calcium phosphide oxide

• tricalcium diphosphate

• calcium phosphate

• carbon phosphate

The name of Fe(OH)₂ is

• iron oxide

• 
  iron (II) hydroxide

• iron hydroxide

• iron dihydroxide

Which of the following combination is incorrect?

• phosphate  PO₄^3- 

• nitrite    NO₃^-

• 
  sulfite  SO₃^2-

• 
  iron(III)    Fe³⁺

What is the formula for Magnesium Carbonate?

• Mg₂CO₆

• 
  Mg(CO₃)₂

• Mg₂CO₃

• MgCO₃

What is the chemical name for Fe(NO₂)₃?

• Iron (III) Nitrate

• Iron (III) Nitrite

• Iron (II) Nitrate

• Iron (II) Nitrite