Question

Among the following which has highest melting point-Bacl2, Becl2, Mgcl2, Cacl2?

Answer 1

Among the given compounds $BaCl_{2}$ has the highest melting point.

Explanation:

As the surrounding atoms in all the given options are same and only the central atom is changing. We know that larger is the atomic size of an atom or element more will be the surface area occupied by it.

Therefore, high will be the amount of heat required by it in order to melt or change its phase. All the given compounds contain group 2 elements.

For example, barium has larger atomic size as compared to all the elements of group 2.

So, $BaCl_{2}$ will have the highest melting point.

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Answer 2

Answer:

Explanation:

As the surrounding atoms in all the given options are same and only the central atom is changing. We know that larger is the atomic size of an atom or element more will be the surface area occupied by it.

Therefore, high will be the amount of heat required by it in order to melt or change its phase. All the given compounds contain group 2 elements.

For example, barium has larger atomic size as compared to all the elements of group 2.

So, will have the highest melting point.