Ionic Compounds and Nickel Phosphide

The video tutorial explains how to write the formula for nickel phosphide. It begins by identifying the element symbols for nickel and phosphide, then discusses the ionic nature of the compound. The tutorial explains how to balance the charges using the crisscross method, resulting in the formula Ni3P2. The video concludes with a verification of the formula and a summary of the process.

What is the symbol for nickel when writing the formula for nickel(II) phosphide?

• P

• Ph

• Ni

• N

Why is it important to consider ionic charges when forming ionic compounds?

• To make the compound more reactive

• To ensure the compound is colorful

• To make the compound neutral

• To increase the compound's weight

What is the ionic charge of nickel in nickel(II) phosphide?

• 3+

• 1+

• 4+

• 2+

Which method is used to balance the charges in nickel(II) phosphide?

• Crisscross method

• Cross-multiplication method

• Addition method

• Substitution method

What is the formula for nickel(II) phosphide derived using the crisscross method?

• Ni3P2

• NiP

• Ni2P3

• NiP2

How do you verify that the formula for nickel(II) phosphide is correct?

• By checking the color of the compound

• By ensuring the charges add up to zero

• By measuring the weight of the compound

• By testing the compound's reactivity

What is the total charge when the charges of nickel and phosphide are balanced in nickel(II) phosphide?

• +2

• +1

• 0

• -1