The correct order of density is

Question

Assertion A : During the boiling of water having temporary hardness, Mg(HCO₃)₂ is converted to MgCO₃.
Reason R : The solubility product of Mg(OH)₂ is greater than that of MgCO₃.

Answer 1

To determine the correct order of density among the given alkaline earth metals (Beryllium (Be), Magnesium (Mg), Calcium (Ca), and Strontium (Sr)), we need to examine their properties. The density of an element is its mass per unit volume, and it depends on its atomic mass and atomic volume.

The density of alkaline earth metals generally increases as we move down the group in the periodic table because the atomic mass increases faster than the atomic volume. However, there are some irregularities due to differences in atomic structure and packing.

Below is the approximate density (in grams per cubic centimeter) for each metal:

Beryllium (Be): 1.85 g/cm³
Magnesium (Mg): 1.74 g/cm³
Calcium (Ca): 1.55 g/cm³
Strontium (Sr): 2.63 g/cm³

From the above data, the correct order of densities is Strontium > Beryllium > Magnesium > Calcium. Strontium has the highest density due to its larger atomic mass relative to its volume. Beryllium, although lighter than Strontium, has a comparatively high density because of its smaller atomic size and tighter atomic packing.

Hence, the correct answer is: Sr > Be > Mg > Ca.

Answer 2

To determine the correct order of density among the given alkaline earth metals (Beryllium (Be), Magnesium (Mg), Calcium (Ca), and Strontium (Sr)), we need to examine their properties. The density of an element is its mass per unit volume, and it depends on its atomic mass and atomic volume.

The density of alkaline earth metals generally increases as we move down the group in the periodic table because the atomic mass increases faster than the atomic volume. However, there are some irregularities due to differences in atomic structure and packing.

Below is the approximate density (in grams per cubic centimeter) for each metal:

Beryllium (Be): 1.85 g/cm³
Magnesium (Mg): 1.74 g/cm³
Calcium (Ca): 1.55 g/cm³
Strontium (Sr): 2.63 g/cm³

From the above data, the correct order of densities is Strontium > Beryllium > Magnesium > Calcium. Strontium has the highest density due to its larger atomic mass relative to its volume. Beryllium, although lighter than Strontium, has a comparatively high density because of its smaller atomic size and tighter atomic packing.

Hence, the correct answer is: Sr > Be > Mg > Ca.

The correct order of density is

The Correct Option is C

Solution and Explanation

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