atomic structure

Alright someone requested this to be up so yeah prioty first for those who wanna learn :D
Atomic structure. An atom is made up of subatomic particles. It is the nucleon, proton and electron. The proton number which is at the bottom of the element determines the number of proton and electron number since proton=electron and it is electrically neutral.
The Nucleus of an atom is made up of nucleon and proton. To find proton you can simply use the nucleon number(mass number) to minus off the proton number.
All atoms are electrically neutral BECAUSE their electrons the negative charge(anion) neutrallise with protons the positive charge(cation).
Recap on my previous post on compounds. First shell can hold up to 2 electrons. Second and Third shell can hold up to 8 shells. For instance, Carbon's proton number is 6, so the electric configuration would be 2.4 which means it needs 4 more electrons to have a fully filled outermost shell to gain the stability the atom desire.
Electrons revolves around the orbit of an atom. Electrons have super high energies because they are the most 'excited' particle can be found on man kind this era.
The outermost shell electrons are called valence electrons or simply outer electrons.

Electronic stucture can be easily identified by the periodic table. Verticle sets that is running down the periodic table is called group. The groups determine the number of electrons at their outermost shell. The horizontal row which is running right side is known as period. The period will determine the number of shells.
Sodium and potassium for example. NA(2.8.1) K(2.8.8.1) both are from the same group but different period. So you can see NA has 3 shells and 1 outer electrons so it is in group 1 period 3. Potassium would have 4 shells and 1 outer electrons so it is in group 1 period 4.
I believe I had revised this before.. But no matter I'll revise again.
A metal atom would lose their valence electrons to non-metal to become a noble configuration. This is called ionic bonding. Ions are atoms that loses are gains electrons. Metals transfer their valence electrons to form a positive ion because their proton number is higher than electron number. Non-metals would receive valence electrons to form a negative ion because their proton number is lower than electron number.
This is called ionic theory and it is very important. It will be used in physics and biology.