Chromium and Phosphorus Compounds

The video tutorial explains how to write the chemical formula for chromium(III) phosphide. It begins by identifying the element symbols for chromium and phosphorus, noting the charges associated with each. The tutorial then explains how to balance these charges to form a neutral compound, resulting in the formula CrP. The video concludes with a brief summary of the process.

What is the element symbol for chromium?

• Co

• Cr

• Ch

• Cm

What does the Roman numeral III indicate in chromium III phosphide?

• The number of phosphorus atoms

• The charge on the chromium ion

• The number of chromium atoms

• The charge on the phosphorus ion

What is the charge on phosphorus in chromium III phosphide?

• 1-

• 3-

• 2-

• 3+

Why do the charges on chromium and phosphorus need to add up to zero?

• To increase reactivity

• To balance the equation

• To create a neutral compound

• To form a stable ion

What is the final formula for chromium III phosphide?

• CrP

• Cr3P2

• Cr2P3

• CrP3