The 2 electrons from 3s orbital.
8
7.
Valence elctrons are involved in chemical reactions.
Copper has 4
For group 12 to 17 you have to subtract 10 to get the valence elctrons.
A fluorine atom has seven valence electrons, as do all halogens.
Magnesium generally appears in two valence forms. The pure, non-reacted element, Magnesium, has no charge. Reacted Magnesium has a valence of +2
12
A magnesium atom has 2 electrons in its valence shell. A magnesium ion has 8 electrons in its valence shell.
No, sulfur has six valence electrons, while magnesium has two valence electrons.
Magnesium is element 12 and belongs to Group 2 of the Periodic Table, are the outermost electrons, magnesium has two valence electrons.
Calcium (Ca) has two valence electrons.