Magnesium and Nitrate Compounds

The video tutorial explains how to write the formula for magnesium nitrate. It starts by identifying magnesium and nitrate ions using the periodic table and a table of polyatomic ions. The tutorial then discusses the ionic nature of the compound and the importance of balancing charges. The crisscross method is introduced to determine the correct subscripts for the formula. Finally, the tutorial verifies the formula to ensure accuracy.

What is the chemical symbol for magnesium?

• Mg

• Mn

• Ma

• M

Which of the following is a polyatomic ion that ends with 'ate'?

• Oxide

• Sulfide

• Nitrate

• Chloride

What is the charge of the nitrate ion (NO3)?

• 1+

• 2-

• 2+

• 1-

In which group of the periodic table is magnesium found?

• Group 4

• Group 1

• Group 2

• Group 3

What is the charge of a magnesium ion?

• 2-

• 2+

• 1-

• 1+

What method is used to balance the charges in magnesium nitrate?

• Cross-multiplication

• Crisscross method

• Substitution method

• Addition method

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

• To indicate it is a polyatomic ion

• To show it is a metal

• To highlight it is a liquid

• To denote it is a gas

How many nitrate ions are present in magnesium nitrate?

• 3

• 2

• 4

• 1

What is the final formula for magnesium nitrate?

• Mg(NO3)

• Mg(NO3)2

• MgNO3

• Mg2(NO3)3