Oxidation Numbers and Calcium Compounds

The video tutorial explains how to find the oxidation numbers for each element in calcium phosphide (Ca3P2). It starts by noting that the compound is neutral, meaning the oxidation numbers must sum to zero. Calcium, being in group two of the periodic table, has an oxidation number of +2. The video then calculates the oxidation number for phosphorus, ensuring the total oxidation numbers add up to zero. The tutorial concludes by summarizing the oxidation numbers for each element in Ca3P2.

What is the overall charge of a neutral compound like Ca3P2?

• Negative

• Positive

• Zero

• Depends on the elements

Which group in the periodic table does calcium belong to?

• Group 4

• Group 3

• Group 2

• Group 1

What is the oxidation number of each calcium atom in Ca3P2?

• +1

• +2

• +4

• +3

How many calcium atoms are present in Ca3P2?

• 1

• 2

• 4

• 3

What must be the total oxidation number of phosphorus in Ca3P2 to maintain neutrality?

• -3

• -2

• -4

• -6

If the oxidation number of phosphorus is -3, how many phosphorus atoms are in Ca3P2?

• 1

• 2

• 4

• 3