Give a brief note on the oxides of alkaline earth metal elements.

(N/A) The alkaline earth metals burn in oxygen to form the monoxide,$MO$,which,except for $BeO$,have a rock-salt structure.
The $BeO$ is essentially covalent in nature. The enthalpies of formation of these oxides are quite high,and consequently,they are very stable to heat.
$BeO$ is amphoteric,while the oxides of other elements are ionic in nature.