Which of the following statements is correct.
(A) Alkali metals are less electropositive than alkaline earth metals
(B) The alkaline earth metals are more denser and harder than alkali metals
(C) The alkali metals are denser and harder than alkaline earth metals
(D) The first IP of alkali metals is more than that of alkaline earth metals
(B). Because of small size, they are more closely packed in the crystal lattice. So they have comparatively stronger metallic bonds and so more denser and harder than alkali metals.