two valence electrons
Then, does magnesium have 8 valence electrons?
Now, magnesium, Mg , has 2 valence electrons. In order to complete its octet, it must get to 8 valence electrons. The only way for magnesium to accomplish this is to give up its two valence electrons and have one of its filled energy levels become the valence shell, i.e. the outermost energy level.
Likewise, people ask, how do you determine valence electrons? Valence electrons can be found by determining the electronic configurations of elements. Thereafter the number of electrons in the outermost shell gives the total number of valence electrons in that element.
Likewise, how many electrons does Mg2+ have?
10 electrons
How many total electrons are in magnesium?
In order to write the Mg electron configuration we first need to know the number of electrons for the Mg atom (there are 12 electrons). When we write the configuration we’ll put all 12 electrons in orbitals around the nucleus of the Magnesium atom.