If you have a periodic table of elements it is the atomic number.
or if you don't it is 80 electrons, same as the atomic number which is also the number of protons.
16 elctrons
8
7.
Copper has 4
3
It is the elctrons of the atoms which move, to transfer charge.
yea then shove it up your but and feel the elctrons in your but
The 2 electrons from 3s orbital.
A fluorine atom has seven valence electrons, as do all halogens.
No. It is protons and neutrons and elctrons combined bit.
Valence elctrons are involved in chemical reactions.
By number of elctrons,protons in them and their reaction rate