Common ions

All metal atoms form positive ions. True or false?

• True
• False

Sodium is in group 1 of the Periodic Table. What is the formula of the ion?

• Na^2-
• Na²⁺
• Na⁺
• Na^-

Tags

NGSS.HS-PS1-1

What is the formula of the ammonium ion?

• NH₃
• NH₃⁺
• NH₂
• NH₄⁺

Silver is a transition metal. The formula of its most common ion is Ag²⁺. True or false?

• True
• False

Sodium sulphate contains the Na⁺ion and the sulfate ion (SO₄^2-). What is the formula for the compound?

• NaSO₄
• Na(SO₄)₂
• Na₂SO₄
• NSO₄

How would you test for the sulfate ion? 

• Add barium chloride and observe a white precipitate
• Flame test and observe a yellow flame
• Add silver nitrate and observe a white precipitate
• Add hydrochloric acid and bubble through limewater which goes cloudy

What is the correct name for this compound? FeCO₃

• Iron (III) carbonate
• Iron (II) carbonate
• Iron carbonate
• Iron carbonide

What colour flame would you expect if a sample contained the Cu²⁺ ion?

• Yellow
• Red
• Lilac
• Blue

What is the correct formula for the compound ammonium chloride?

• NH₃Cl
• NH₄Cl₂
• NH₄⁺Cl^-
• NH₄Cl

What is the correct formula for the compound calcium fluoride? 

• CaF
• CaFl₂
• CaF₂
• CaFl