Oxidation Numbers and Manganese

The video tutorial explains how to determine the oxidation numbers for each element in manganese(II) oxide (MnO). It begins by noting that MnO is a neutral compound, meaning the sum of its oxidation numbers is zero. Oxygen typically has an oxidation number of -2, which is confirmed here. Manganese, being a transition metal, can have various oxidation states, but in MnO, it is +2 to balance the -2 from oxygen, resulting in a neutral compound. The tutorial concludes by summarizing these findings.

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

• Depends on the elements

• Negative

• Positive

• Zero

What is the typical oxidation number assigned to oxygen in compounds?

• -1

• +2

• -2

• 0

Why is the oxidation number of oxygen in MnO considered to be -2?

• Oxygen is a noble gas

• Oxygen is always -2 in compounds with few exceptions

• Oxygen is a metal

• Oxygen has a variable oxidation state

What type of element is manganese in MnO?

• Noble gas

• Alkali metal

• Transition metal

• Non-metal

How do we determine the oxidation number of manganese in MnO?

• By checking its color

• By considering the oxidation number of oxygen and the neutrality of the compound

• By looking at its position in the periodic table

• By assuming it is always +3

What is the oxidation number of manganese in MnO?

• +4

• +3

• +2

• +1