The alkaline earth metal with least density is

Options

A. Mg
B. Be
C. Sr
D. Ca

Answer

D

Explanation

As the nuclear charge increases and size decreases, density increases. But density slightly decreases upto clacium and then increases considerably upto radium due to a hard difference in the crystal structure of these elements.
`{:(,"Be","Mg","Ca","Sr","Ba","Ra"),("Density (g/mL)",1.84,1.74,1.55,2.63,3.59,5.5):}`