Alkaline earth metals (except $Be$) can easily lose their valence electrons. Therefore,how do they behave?

Magnesium powder burns in air to give

Which halide of alkaline earth metals is covalent in nature and can be soluble in organic solvent, such as ethanol?

Compare the properties of beryllium with other alkaline earth metal elements.

An alkaline earth metal $(M)$ gives a salt with chlorine,which is insoluble in water at room temperature but soluble in boiling water. It also forms an insoluble sulphate whose mixture with a sulphide of a transition metal is called 'lithopone' - a white pigment. Metal $M$ is

$Assertion$ $(A)$: Helium and beryllium have similar outer electronic configuration $ns^2$. $Reason$ $(R)$: Both are chemically inert.