Question

Which rule for assigning oxidation numbers IS correct?

Hydrogen is usually -1.
Oxygen is usually -2.
• A pure group 1 element is +1.
• A monatomic ion is 0.

Answer 1

B.) Oxygen is usually -2

Step-by-step explanation:

Hydrogen is usually +1.

A pure group 1 element is not always +1.

A monoatomic ion can be a range of numbers. However, it must be a charge other than 0.