Nickel(II) Nitrate and Polyatomic Ions

The video tutorial explains how to write the formula for nickel(II) nitrate. It begins by identifying nickel and nitrate ions, noting that nitrate is a polyatomic ion. The tutorial then discusses the formation of ionic compounds, focusing on the charges of nickel and nitrate. Using the crisscross method, the video demonstrates how to achieve a neutral compound. Finally, it verifies the formula and concludes with a review.

What is the chemical symbol for nickel?

• Ni

• Na

• N

• Ne

Which of the following is a polyatomic ion?

• Nickel

• Sodium

• Nitrate

• Neon

What is the charge of the nitrate ion?

• 1-

• 2-

• 2+

• 1+

What does the Roman numeral in nickel(II) nitrate indicate?

• The number of nitrate ions

• The charge of nickel

• The number of electrons in nickel

• The atomic number of nickel

What is the charge of nickel in nickel(II) nitrate?

• 1+

• 2+

• 2-

• 1-

What method is used to balance the charges in nickel(II) nitrate?

• Crisscross method

• Balancing method

• Cross-multiplication

• Substitution method

Why do we use parentheses around the nitrate ion in the formula?

• To highlight it is a liquid

• To denote it is a gas

• To show it is a metal

• To indicate it is a polyatomic ion

How many nitrate ions are present in nickel(II) nitrate?

• Four

• One

• Three

• Two

What is the net charge of a correctly balanced nickel(II) nitrate compound?

• 1+

• 0

• 1-

• 2-

What is the final formula for nickel(II) nitrate?

• Ni(NO3)

• Ni2(NO3)2

• Ni2(NO3)

• Ni(NO3)2