Copper Compounds and Ionic Charges

The video tutorial explains how to write the formula for copper(I) phosphide. It begins by identifying the element symbols for copper and phosphorus, then discusses the ionic charges of these elements. The tutorial uses the crisscross method to balance the charges and form a neutral compound, resulting in the formula Cu3P. The video concludes with a verification of the formula.

What is the symbol for copper in the periodic table?

• Cu

• Cr

• Co

• C

What type of compound is formed between a metal and a nonmetal?

• Molecular

• Covalent

• Ionic

• Metallic

What is the ionic charge of copper in copper(I) phosphide?

• 0

• -1

• +1

• +2

Which group does phosphorus belong to on the periodic table?

• Group 5A

• Group 7

• Group 3B

• Group 1

What method is used to balance the charges in copper(I) phosphide?

• Substitution method

• Cross-multiplication

• Addition method

• Crisscross method

In the crisscross method, what happens to the charge of phosphorus?

• It is ignored

• It becomes the subscript of copper

• It becomes the subscript of phosphorus

• It is doubled

What is the final formula for copper(I) phosphide?

• Cu2P

• Cu3P

• CuP3

• CuP

How do you verify the correctness of the formula for copper(I) phosphide?

• By checking the color

• By checking the melting point

• By ensuring the charges add up to zero

• By measuring the mass