Chromium and Phosphorus Chemistry

The video tutorial explains how to write the formula for chromium-6 phosphide. It begins by identifying the element symbols for chromium (Cr) and phosphide (P). The video then discusses the ionic charges, with chromium having a 6+ charge and phosphorus having a 3- charge. To balance the charges and form a neutral compound, two phosphorus atoms are needed to balance one chromium atom, resulting in the formula CrP2. The tutorial concludes with a summary of the process and the final chemical formula.

What is the chemical symbol for chromium?

• Cm

• Cr

• Co

• Ch

Which group does phosphorus belong to on the periodic table?

• Group 10

• Group 18

• Group 1

• Group 5A

What is the ionic charge of chromium in chromium-6 phosphide?

• 5-

• 2-

• 6+

• 3+

How many phosphorus atoms are needed to balance the charge of one chromium atom in chromium-6 phosphide?

• Four

• One

• Two

• Three

What is the correct formula for chromium-6 phosphide?

• CrP

• Cr2P3

• CrP2

• Cr3P2