i need to know how to make pure sodium

As you should know table salt is made of sodium (which is a metal) and chlorine gas (gas, self explaining). If you heat salt to it's melting point the chlorine gas will evapotate away leaving behind pure sodium. This method will work but 2 problems are being posed. 1) chlorine gas is VERY deadly, don't breathe it. and 2) pure sodium reacts violently when is touches water, so any moisture in the air will set it off. I'll let you figure out how to deal with all of that though. I hope I helped you a little. Don't hurt yourself.

Potassium functions very similarly to sodium, only it reacts faster. I say this because potassium chloride (common salt substitute) has a much lower melting point than salt.