Reduction and Oxidation

[Ryan Neis 2L]

When an oxidation of an element increases is it oxidized or reduced?

[Marina Georgies 1C]

I assume you mean oxidation number/state. When it increases, the element is being oxidized, and when it decreases, reduced.

[Emily Oren 3C]

When the oxidation number increases, it is being oxidized, and if the oxidation number decreases, it is being reduced.

[KayleeMcCord1F]

Is it necessary to memorize the oxidation numbers for some elements?

[Gevork 2E]

Is it necessary to memorize the oxidation numbers for some elements?

I think that is useful to know the most common elements that we are going to be seeing. I think it will help in general with the material, and might help to solve problems faster. I wouldn't worry too much about it though.