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.
8
7.
16 elctrons
Copper has 4
3
The 2 electrons from 3s orbital.
yea then shove it up your but and feel the elctrons in your but
It is the elctrons of the atoms which move, to transfer charge.
A fluorine atom has seven valence electrons, as do all halogens.
Valence elctrons are involved in chemical reactions.
No. It is protons and neutrons and elctrons combined bit.
By number of elctrons,protons in them and their reaction rate