Grade 8 Chemistry chapter 5.2

What is the chemical formula of Magnesium chloride?

• MgCl

• MgCl₂

• MgC

• MgC_2

What is the chemical formula of sodium sulfate?

• SSO₄

• SoSO₄

• NaSO₄

• Na₂SO₄

What is the name of this chemical, H₂SO₄?

• Hydrogen sulfate

• Sulfuric acid

• Sulfate

• Sulfate hydrogen

What is the formula of Copper (II) oxide?

• CUO

• CuO

• CuO₂

• Cu₂O

What is the formula of nitric acid?

• H₂SO₄

• HNO₃

• HCl

• hno₃

What is the valency of Calcium (Ca)

• 1

• 2

• 3

• 4

What is the valency of Nitrogen (N)?

• 1

• 2

• 4

• 3

How many valence electrons are in an atom of Ba?

• 2
• 8
• 4
• 1

How many valence electrons are in an atom of Ar?

• 2
• 8
• 4
• 1

How many valence electrons are in an atom of K?

• 3
• 8
• 4
• 1