Question

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

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

Hint:

When considering trends in the periodic table, remember that exceptions can occur due to changes in atomic structure and electron configuration that affect physical properties like density.

Answer 1

The Correct Option is A

- The density of the elements typically increases with increasing atomic mass as you go down a group in the periodic table.
- For the alkaline earth metals (Group 2), this general trend applies except for some anomalies due to atomic packing and atomic weight.
- Strontium (Sr) has the highest density among the given elements, followed by beryllium (Be), magnesium (Mg), and calcium (Ca).