[Highschool - Chemistry] Chemical Reactions and Equations

[chez-the-guy]

So for one of my summer assignments that I have to do to take AP Chemistry next year, I have to answer a couple of questions.
I've stumbled on some:



I have all four parts of #6 balanced and I know the reaction types.

However, #7 refers back to the fourth equation of #6 and asks for the net ionic equation of:

Pb(NO3)2 + 2NaCL -> PbCl2 + 2NaNO3
(I might have balanced this incorrectly)

However, I don't understand what an ionic equation should be / how to find it (much less a net ionic equation).

Also in number 8 it asks for the substance being oxidized and reduced for the first equation in #6:

Br2 + 2NaI -> I2 + 2NaBr

So if, by definition, the substance being oxidant gains electrons (and is reduced) in a chemical reaction, does that mean that bromine is the substance being oxidized (because of it gaining an electron from Br2 to Br on the reactants side)?