Question

The correct order of density of Be, Mg, Ca, Sr is:

• A. \( Sr>Be>Mg>Ca \)
• B. \( Sr>Ca>Mg>Be \)
• C. \( Be>Mg>Ca>Sr \)
• D. \( Be>Mg>Sr>Ca \)

Hint:

In Group 2, density generally increases down the group, except for Beryllium, which has a higher density than Magnesium.

Answer 1

The Correct Option is B

Step 1: Density Trend in Alkaline Earth Metals Density in Group 2 (Alkaline Earth Metals) typically increases down the group, but Beryllium is an exception due to its compact atomic structure. Step 2: Density Values Measured densities (g/cm³): \[ \text{Be} = 1.85, \text{Mg} = 1.74, \text{Ca} = 1.55, \text{Sr} = 2.64 \] Conclusion Thus, the correct order is: \[ Sr>Ca>Mg>Be \]