You mean valence electron?
2
If your talking about Bohr Diagrams then it depends on the metal
less than 2 (1)
alkaline earth metals such as Be, Mg, Ca, Sr, Ba, Ra
alkaline earth metals (group 2 elements) have two valence electrons
Alkali and alkaline earth metals. Cations.
Most atoms have the ability to lose electrons, given the conditions are favorable, e.g. in a chemical reaction, but the ones that loose their electrons easiest are the ones with only a few electrons in their outer shell, such as the alkali metals and alkaline earth metals which only have 1 and two electrons, respectively.
Alkaline earth metals are group 2 elements and have 2 valence electrons.
Alkaline earth metals are group 2 elements and have 2 valence electrons.
The alkaline earth metals have 2 valence electrons.
The alkaline earth metals are those in the same group as calcium; they have two valence electrons.
less than 2 (1)
less than 2 (1)
All alkaline earth metals loss two electrons.
Alkaline earths have 2 valence electrons.
alkaline earth metals such as Be, Mg, Ca, Sr, Ba, Ra
alkali metals have one valence electron, whereas alkaline earth metals have two valence electrons.
The alkaline earth group has two valence electrons.
Helium has 2 valence electrons. Group 2 elements (alkaline earth metals) also have 2 valence electrons.