LSS Chemical Formulae: How much do you remember?

What is the charge of ammonium ion?

• 1+

• 2+

• +1

• +2

What is the chemical formula of potassium iodide?

• KCl

• PI

• KI

• PCl

Which of the following transition metals have two or more charges?

• Zn and Cu

• Ag and Fe

• Fe and Cu

• Pb and Ag

Which of the following statements is wrong?

• Lead can only form one type of ions.

• Ionic bond is the electrostatic forces of attraction between ions.

• Iron forms cations.

• Carbon does not form ions easily.

What is the chemical formula of barium carbonate?

• BaCO₂

• Ba₂CO₃

• Ba₂CO₂

• BaCO₃

Which of the following elements does not usually form ions?

• Mg

• O

• Si

• Be

Which is the correct chemical formula for copper (I) sulfate?

• CuSO₄

• Cu₂SO₄

• Cu(SO₄)₂

• (Cu)₂SO₄

What is the name of Ca(HCO₃)₂?

• calcium hydrogen carbon oxide

• calcium hydrogencarbonate

• calcium carbonate

• calcium hydrocarbonate

Which of the following has a different charge from the rest?

• nitrate ion

• chloride ion

• sulfide ion

• hydroxide ion

How many atoms are present in this chemical formula: Al₂(CO₃)₃ ?

• 3

• 6

• 10

• 14