Compare the alkali metals and alkaline earth metals with respect to 

(i) ionisation enthalpy 

(ii) basicity of oxides and 

(iii) solubility of hydroxides.

Asked by Pragya Singh | 1 year ago |  48

1 Answer

Solution :-

Sr.No Alkaline earth metals Alkali Metals
(a) Solubility of hydroxide:They are less soluble compared to alkali metals
as it has high lattice energy and is having
higher charge densities account for higher lattice.

Solubility of hydroxide:

They are more soluble compared to alkaline earth metals.

(b)

Ionization Enthalpy:

They have smaller atomic size and higher effective nuclear charge compared to alkali metals, 

which causes their 1st ionization enthalpy higher than that in alkali metals, 

but the 2nd ionization enthalpy is less than that of alkali metals

Ionization Enthalpy:

They have large atomic size compared to alkaline earth metals, 

so they are having less 1st ionization enthalpy, so they lose valance electrons very easily.

(c)

Basicity of oxides:

Their oxides are quite basic but less as compared to those of 

alkali metals as they are less electro positive than alkali metals.

Basicity of oxides:

Their oxides are basic in nature as they are 

highly electropositive, which makes their oxides highly ionic.

 

Answered by Abhisek | 1 year ago

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