Nitrogen and Chromium Compounds

The video tutorial explains how to write the formula for chromium-3 nitride. It begins by identifying the element symbols for chromium and nitrogen. The video then discusses the charges associated with these elements, emphasizing the importance of balancing them to achieve a neutral compound. The tutorial concludes by presenting the final formula for chromium-3 nitride and summarizing the key points covered.

What is the symbol for chromium in the periodic table?

• Cr

• Cm

• Co

• Ch

What does the Roman numeral III indicate in chromium-3 nitride?

• The charge of chromium

• The number of nitrogen atoms

• The atomic number of chromium

• The number of electrons in nitrogen

What is the charge of nitrogen in the compound chromium-3 nitride?

• 1+

• 3-

• 2-

• 3+

Which group is nitrogen in on the periodic table?

• Group 5

• Group 3

• Group 15

• Group 17

Why do the charges in chromium-3 nitride need to add up to zero?

• To ensure the compound is neutral

• To make the compound stable

• To balance the atomic mass

• To match the number of atoms

What is the final formula for chromium-3 nitride?

• CrN

• Cr3N

• Cr2N3

• CrN3