Short Answer TypeThe alkaline earth metals are denser and harder than the corresponding alkali metals. Explain ?
The atoms of alkaline earth elements have smaller size and stronger intermetallic bonds, as compared to alkali metals. Therefore, they are more closely packed in their crystal lattices which account for high density and hardness of these elements.
In general, the density first decreases up to calcium and then increases up to radium. The case for a decrease in density up to calcium is presumably due to less good packing arrangement of constituents in the solid lattice.
What is the trend of atomic and ionic radii of alkaline earth metals within the group?
The atomic and ionic radii of alkaline earth metals are smaller than those of the corresponding alkali metals. Explain.
How will you explain that alkaline earth metals have much higher melting and boiling points than those of alkali metals?
The first ionisation enthalpies of alkaline earth metals are higher than those of corresponding alkali metals. Explain.
Second ionisation enthalpies of alkali metals are much higher than those of the alkaline earth metals. Explain.
How will you explain the electropositive or metallic character of alkaline earth metals?
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