[Mikez]

How do I find out the number of oxidation numbers for an atom (when it's not listed on my periodic table for a test)?

Also why would an oxyacid bond with other atoms if it already has a overall charge of 0?

Finally, is there a easy way to determine the type of reaction and product, given the reactants?

thanks

[kataklysmic]

to answer the question you had about determining reactions, there's no really easy way to remember, but it will most likely be one of a few common types:

single replacement, where there is a compound and a single element reacting:
A+BC= AC+B ... and the compound will change.

double replacement:
AB+ CD=AC+BD... where both compounds change

neutralization:
acid + base = inorganic salt + water

hydrocarbon combustion:
hydrocarbon + oxygen = water + carbon dioxide

... of couse to decide what replaces what in replacement reactions, you'll need to look at your periodic table. for example, if you have a compound containing an alkali metal and another with a halogen, you can assume that these two will form a compound during the reaction.

[pizza1512]

Well, the products can be determined by whether the original products are acids, bases or alkalines.

[constant thinker]

How do I find out the number of oxidation numbers for an atom (when it's not listed on my periodic table for a test)?

Memorizing trends. Really it's just flat out memorization. Just make sure you know the most common oxidation states of the transition metals. The other non-transition elements are usually pretty easy.

Also why would an oxyacid bond with other atoms if it already has a overall charge of 0?

Remember oxyacids are really just a polyatomic ion with a hydrogen cation bonded to it. Different oxyacids also have different properties. You may want to check the wiki article to see if it has anything.

Finally, is there a easy way to determine the type of reaction and product, given the reactants?

Often a time, you determine products usually by looking at a reactivity series or solubility chart. You can tell what kind of reaction it is similarly. You also need to look to see what kind of compounds you have as reagents. Best way to learn how to do reactions, is practice.