Explain why can alkali and alkaline earth metals not be obtained by chemical reduction methods?

The metal obtained by self reduction process is

Why alkaline earth metals donot from monovalent ions ?

Fluorine can not be obtained from fluoride by chemical methods. Why ?

The oxides of alkali and alkali earth metals are basic and the their strenght increases down the group. The solubility of carbonates and sulphates of alkali and earth metals shown opposite trends. Only the carbonates of Li and alkaline earth metals decompose on heating. The bicarbonates of both alkali and alkali earth metals on heating give carbonates The correct decreasing order of basic character of the oxides is

The oxides of alkali and alkali earth metals are basic and the their strenght increases down the group. The solubility of carbonates and sulphates of alkali and earth metals shown opposite trends. Only the carbonates of Li and alkaline earth metals decompose on heating. The bicarbonates of both alkali and alkali earth metals on heating give carbonates indentify the correct order of thermal stablities

Alkaline earth metal having least melting point is

The activity of alkaline earth metals as reducing agents

The alkaline earth metal that forms mainly covalent compounds is

Hydrides of alkaline earth metals do not posses same nature. Comment

The alkaline earth metal whose oxide is amphoteric from the following