Ok this question is a little tricky question. Let us answer this question based on concept of band theory. let us look at group 1 metals. Take the example of Na. It has only one valance electron. Hence the band diagram will be incomplete when sketched and due to this the nature of the element that is Na is metallic and also it exhibits good conductivity.
Now let us take the case of group 2 metals. Since the valence electron will be two and both of them will be filled, there will be an overlap of band. This will give it metallic nature but on the contrary since there will not be empty states it will be a poor conductor when compared to group 1.
Note: Group 2 metals exhibit conductivity but on a comparative scale with group 1 and 3 they are bad conductors.
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a. each is a good conductor of electricity b. they are never found uncombined in nature c. they lose two electrons in chemical reactions
No. The alkali and alkaline earth metals are very reactive.
The alkaline earth metals are in the group 2 of the periodic table of Mendeleev.
All alkaline earth metals and their salts are reactive and they have a blue-print that identifies them as an alkaline earth metal but metals exist as metals, and salts as salts, with different structural compounds.
Beryllium, magnesium and barium are three more alkaline earth metals.