Chromium and Nitrite Ions Concepts

The video tutorial explains how to write the chemical formula for Chromium III Nitrite. It begins by identifying the element symbol for Chromium and the charge indicated by the Roman numeral III. The tutorial then explains the nitrite ion, its charge, and how to balance the charges to form a neutral compound. Finally, it demonstrates the steps to write the complete formula, Cr(NO2)3, ensuring the charges are balanced.

What is the element symbol for Chromium?

• Co

• Cr

• Cm

• Ch

What is the charge of the nitrite ion?

• 1-

• 2-

• 1+

• 3+

Where can you find information about polyatomic ions like nitrite?

• Periodic Table

• Chemical Reactions Chart

• Table of Polyatomic Ions

• Elemental Symbols List

What is the charge of Chromium in Chromium III Nitrite?

• 1+

• 4+

• 2+

• 3+

How many nitrite ions are needed to balance the charge of one Chromium ion?

• 2

• 3

• 4

• 1

What is the net charge of Chromium III Nitrite?

• 1+

• 0

• 2-

• 3+

Why are parentheses used in the formula for Chromium III Nitrite?

• To separate elements

• To denote a charge

• To show a single ion

• To indicate multiple ions

What is the correct formula for Chromium III Nitrite?

• Cr2(NO2)3

• CrN2O3

• Cr(NO3)2

• Cr(NO2)3