Ionic Compounds and Their Properties

The video tutorial explains how to write the formula for nickel 2 sulfate. It begins by identifying nickel as a transition metal with a 2+ ionic charge. The sulfate ion, a polyatomic ion with a 2- charge, is introduced. The tutorial then combines these to form an ionic compound, ensuring the net charge is zero, resulting in the formula for nickel 2 sulfate.

What is the element symbol for nickel as found on the periodic table?

• Ne

• Ni

• N

• Nk

What does the Roman numeral '2' indicate in nickel 2 sulfate?

• The number of sulfate ions

• The ionic charge of nickel

• The number of nickel atoms

• The atomic number of nickel

Which of the following is a polyatomic ion?

• Nickel

• Sulfate

• Hydrogen

• Oxygen

What is the chemical formula for the sulfate ion?

• SO3 2-

• SO4 2-

• SO2 2-

• SO4 3-

What must be true about the net charge of an ionic compound?

• It must be positive

• It must be negative

• It must be zero

• It can be any value