So here it says which of the following elements would have the most positive oxidation number based on its ionic form. Now if you've watched my videos on periodic table charges, you'll remember that the periodic table has some key things we need to remember when it comes to particular elements and their charges.

For example, silver. Silver is a transition metal. Most transition metals have multiple charges. Silver on the other hand does not. Remember, silver is always plus one for its oxidation number, scandium. Scandium is also a transition metal. It's in Group 3B, remember? So group 3B elements. They tend to have a charge of +3.

Next we have sodium. It's in Group 1A, so its charge is +1, and then sulfur is in Group 6A, so its charge is -2. We're looking for the most positive oxidation number, and that would have to mean that option B is the correct choice. It has the biggest positive value of +3.

Remember, if you haven't gotten a chance to look at my periodic table videos on charges, and you just want to go and take a look at the different types of elements and their charges, I highly suggest that you go back and take a look, because when it comes to charges of elements, it's going to form a foundation for a lot of later topics. We're going to cover in Chemistry one in Chemistry 2.

All right, so just remember in this question the answer would have to be option B. It has the most positive charge and therefore the most positive oxidation.