Oxidation Numbers and Magnesium Compounds

The video tutorial explains how to find the oxidation numbers for magnesium nitride (Mg3N2). It begins by highlighting that Mg3N2 is a neutral compound, meaning the oxidation numbers must sum to zero. Magnesium, being in group two of the periodic table, has an oxidation number of +2. With three magnesium atoms, the total is +6. To balance this, nitrogen must have an oxidation number of -3, as there are two nitrogen atoms, resulting in -6. The video concludes by summarizing these findings.

What is the total oxidation number for a neutral compound like Mg3N2?

• It is equal to the number of atoms in the compound.

• It is zero.

• It is always negative.

• It is always positive.

Which group in the periodic table does magnesium belong to?

• Group 1

• Group 2

• Group 3

• Group 4

What is the oxidation number of a single magnesium atom in Mg3N2?

• +4

• +3

• +2

• +1

How many magnesium atoms are present in Mg3N2?

• 4

• 3

• 2

• 1

What is the oxidation number of a single nitrogen atom in Mg3N2?

• -4

• -1

• -2

• -3

How does the oxidation number of nitrogen ensure the neutrality of Mg3N2?

• By being positive

• By being zero

• By being equal to magnesium's oxidation number

• By being negative