Naming and Charges of Copper Compounds

The video tutorial explains how to name the compound Cu2S. It starts by identifying the metal ion, copper, and the non-metal ion, sulfur, changing the suffix to 'IDE' to form 'sulfide'. Since copper is a transition metal, its charge is determined by the charge of sulfur, which is 2-. Therefore, copper must have a 1+ charge to balance the compound. The final name is 'copper I sulfide', with the Roman numeral indicating the charge of copper.

What is the first step in naming Cu2S?

• Change the ending to 'ide'

• Identify the non-metal

• Identify the metal

• Determine the charge

How do you modify the non-metal's name when naming a compound?

• Keep the original name

• Change the ending to 'ide'

• Add 'ite' to the end

• Add 'ate' to the end

Why is it necessary to determine the charge of copper in Cu2S?

• Because copper is a noble gas

• Because sulfur's charge is unknown

• Because copper is a transition metal

• Because copper is a non-metal

What is the ionic charge of sulfur in Cu2S?

• 2+

• 2-

• 1-

• 1+

How is the charge of copper represented in the name of Cu2S?

• As a subscript

• As a prefix

• In Roman numerals

• In Greek letters

What is the final name for Cu2S?

• Copper sulfide

• Copper(I) sulfide

• Copper(II) sulfide

• Copper disulfide

Why is the Roman numeral 'I' used in the name of Cu2S?

• It indicates the number of sulfur atoms

• It shows the charge of copper

• It represents the atomic number of copper

• It denotes the number of copper atoms