Gold(I) Cyanide and Cyanide Ion

The video tutorial explains how to write the chemical formula for gold(I) cyanide. It begins by identifying gold on the periodic table as 'Au' with a positive charge. Cyanide, a polyatomic ion, is identified as 'CN' with a negative charge. The tutorial explains that these charges must balance to form an ionic compound with a net charge of zero, resulting in the formula AuCN. The video also covers how to name the compound, recognizing the cyanide ion's charge and the transition metal nature of gold, which requires a Roman numeral in its name.

What is the symbol for gold on the periodic table?

• Ag

• Au

• Pb

• Fe

Which of the following best describes cyanide?

• A single element

• A polyatomic ion

• An alkali metal

• A noble gas

What is the ionic charge of the cyanide ion?

• 3+

• 1-

• 2-

• 1+

How do the charges in gold(I) cyanide balance out?

• They do not balance

• Both are positive

• Both are negative

• One is positive, one is negative

What is the net charge of gold(I) cyanide?

• 1+

• 1-

• 0

• 2-

Why is a Roman numeral used in the name of gold(I) cyanide?

• To indicate the number of atoms

• To specify the compound's state

• To show the ionic charge of gold

• To denote the compound's color

What is the correct name for the compound with the formula AuCN?

• Gold tricyanide

• Gold(II) cyanide

• Gold cyanide

• Gold(I) cyanide