Naming and Formulas of Ionic Compounds

The video tutorial explains how to name the compound K3P by identifying potassium as a metal and phosphorus as a nonmetal. It details the process of naming the metal and nonmetal according to the periodic table and modifying the nonmetal's name to end in 'ide'. The tutorial also covers deriving the chemical formula K3P by balancing the charges of potassium and phosphorus. The video concludes with a brief summary and thanks from Dr. B.

What is the first step in naming the compound K3P?

• Identify the nonmetal in the compound.

• Cross out the ending of the nonmetal's name.

• Write the name of the metal as it appears on the periodic table.

• Determine the charge of the metal.

How is the name of the nonmetal modified when naming K3P?

• Keep the name unchanged.

• Add 'ate' to the end.

• Replace the ending with 'ide'.

• Add 'ium' to the end.

What is the charge of phosphorus when determining the formula for potassium phosphide?

• 4+

• 3-

• 1+

• 2-

In which group is potassium found on the periodic table?

• Group 1

• Group 2

• Group 15

• Group 16

Why do we need three potassium ions to balance one phosphorus ion in K3P?

• Because phosphorus has a 3- charge.

• Because potassium has a 3+ charge.

• Because phosphorus has a 2- charge.

• Because potassium has a 2+ charge.

What is the final chemical formula for potassium phosphide?

• P3K

• K3P

• PK3

• KP3