Basic chemistry, and how many electrons do atoms have + in what shell of electons?

Hey guys, i thought i'll share abit about myself today...
I study chemistry, and thought i'd teach you a little something about chemistry :D
As you can see above there is a table, this is the periodic table... each element every discovered is shown here.

Okay what makes each element different?
Well Each element consists of protons, neatrons and electrons, protons have a positive charge and electons have a negative charge, and you guessed it neatrons are neatral :D, each element has a different number of electrons neatrons and protons :) electrons and protons are the same amount unless the atom is unbalanced in charge, i.e the atom is overall positive +1 or +2 etc etc

Here is the orbit of electrons around the nucleus, how do you know how many electrons are in each shell (the path what elecrons follow around the nucleus, each shell is abit further out than the one before) ? This is where it gets a little tricky... Each atom if its big enough its basic structure is 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 - the first number shows the shell its on, the second number is the amount following this path around. If you look at the periodic table and work horizontally (left to right) first is hydrogen then its helium, the number above it is the amount of electrons in the shell so hydrogen has 1 and helium has 2. For the elements lower down, the number of the row down shows what shell its on so say its 4 down its going to be in the 4s2 4p6 4d10 area, look at ZN - Zinc it says 12 above it, so count along, 4s2, 4p6.. thats 8 of the 12, so now its 4d4. Its 4d4 because that area of the shell has 10 spaces for electrons and only 4 are left.

That is a easy way to find out how many shells there is and how far into the shell it is.

I'll post more details later about atoms and there structures later :)
what you think guys? Will accept critisism :)