Gold(III) Oxide and Its Properties

The video tutorial explains how to write the chemical formula for Gold(III) Oxide. It begins by identifying gold as a transition metal with a 3+ charge and oxygen with a 2- charge. The crisscross method is used to balance these charges, resulting in the formula Au2O3. The tutorial concludes by verifying the formula through charge balance, ensuring the net charge is zero.

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

• Go

• G

• Au

• Ag

Why is the Roman numeral III used in the name gold(III) oxide?

• It represents the atomic number of gold.

• It shows the oxidation state of gold.

• It denotes the number of oxygen atoms.

• It indicates the number of gold atoms.

What is the ionic charge of oxygen in gold(III) oxide?

• 2+

• 3+

• 2-

• 3-

Which method is used to balance the charges in gold(III) oxide?

• Substitution method

• Crisscross method

• Factorization method

• Elimination method

What is the correct formula for gold(III) oxide?

• Au2O3

• Au3O2

• AuO3

• AuO2

How do the charges of gold and oxygen add up in gold(III) oxide?

• They add up to 1.

• They add up to -1.

• They add up to 0.

• They add up to 2.