Oxidation Numbers and Calcium Compounds

The video tutorial explains how to determine oxidation numbers for elements in calcium nitride (Ca3N2). It starts by identifying the compound as neutral, meaning the sum of oxidation numbers is zero. Calcium, being in group two, has a +2 oxidation number. The tutorial then demonstrates how to calculate nitrogen's oxidation number using algebraic methods, showing it to be -3. An alternative method using equations is also presented. The video concludes by summarizing the oxidation numbers for each element in the compound.

What is the overall charge of a neutral compound like calcium nitride?

• Positive

• Negative

• Zero

• Depends on the elements

Which group on the periodic table does calcium belong to?

• Group 4

• Group 1

• Group 2

• Group 3

What is the oxidation number of calcium in calcium nitride?

• +1

• +4

• +2

• +3

How do you determine the oxidation number of nitrogen in calcium nitride?

• By using a calculator

• By balancing the total oxidation numbers to zero

• Using the periodic table

• By guessing

What is the oxidation number of nitrogen in calcium nitride?

• -2

• -1

• -3

• -4

What equation can be set up to find the oxidation number of nitrogen?

• 3 * 2 + 2x = 0

• 3x + 2 = 0

• 2x - 3 = 0

• x + 3 = 0

What is the final oxidation number of each nitrogen atom in calcium nitride?

• -3

• -2

• -4

• -1

Who is the narrator of the video?

• Dr. C

• Dr. B

• Dr. D

• Dr. A