Need asap with this chemistry if someone could me

1.) how many valence electrons do each of these atoms have?
what is the lewis dot structure for these atoms?
how many electrons will these elements gain or lose to obtain a complete octet?

n na al f

2.) identify these compounds as either ionic or molecular:

no2
mgcl2
co2
k2so4

3.) identify the following compounds as either molecular or ionic: if they are ionic, determine the identity and charge of the component ions and name the compound.

cah2
h2o
nh4f
nabr

4.) atom x is in group 2a and atom y is in group 7a. when these elements form a compound, what will the formula be?

5.) determine the correct formula and molecular weight for each of the following compounds:

barium sulfide
sodium acetate
potassium phosphate