Magnesium and Dichromate Concepts

The video tutorial explains how to write the formula for magnesium dichromate. It begins by identifying the symbols for magnesium and dichromate, noting that dichromate is a polyatomic ion with a 2- charge. The tutorial then discusses the need to balance the charges between magnesium, which has a 2+ charge, and dichromate to form a neutral compound. The final formula for magnesium dichromate is derived by ensuring the net charge is zero.

What is the chemical symbol for magnesium?

• Ma

• Md

• Mn

• Mg

Which of the following is the correct formula for the dichromate ion?

• CrO4

• Cr2O7

• Cr2O4

• CrO3

What is the charge of the dichromate ion?

• 2+

• 1+

• 2-

• 1-

In which group of the periodic table is magnesium found?

• Group 3

• Group 4

• Group 1

• Group 2

What is the net charge of magnesium dichromate?

• 0

• 1+

• 3+

• 2-