Understanding Magnesium Nitrite and Ions

The video tutorial explains how to write the formula for magnesium nitrite. It begins by identifying magnesium and nitrite ions, noting that nitrite is a polyatomic ion. The tutorial discusses the ionic charges of magnesium and nitrite, emphasizing the need for a neutral compound. The crisscross method is used to balance the charges, resulting in the formula Mg(NO2)2. The tutorial concludes by verifying the formula's correctness through charge balance.

What is the symbol for magnesium on the periodic table?

• Md

• Ma

• Mn

• Mg

Why is nitrite not found on the periodic table?

• It is a transition metal

• It is a noble gas

• It is a polyatomic ion

• It is a metal

What is the charge of a magnesium ion?

• 1+

• 2+

• 1-

• 2-

What is the charge of a nitrite ion?

• 1+

• 2+

• 1-

• 2-

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

• Addition method

• Substitution method

• Crisscross method

• Elimination method

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

• To show it is a polyatomic ion

• To indicate it is a metal

• To highlight it is a gas

• To denote it is a liquid

How many nitrite ions are needed to balance the charge with one magnesium ion?

• Four

• Three

• Two

• One

What is the net charge of the magnesium nitrite compound?

• 1+

• 0

• 2-

• 1-

What is the correct formula for magnesium nitrite?

• MgNO3

• Mg(NO2)2

• MgN2O4

• Mg2(NO2)3

What is the purpose of verifying the formula?

• To ensure the compound is a gas

• To confirm the net charge is zero

• To determine if it is a liquid

• To check if it is a metal