Melting points of group IIA elements are considerably higher than those of group IA elements because;
Correct answer: D. IIA provide more binding electron
- A. Size of IIA is greater than IA
- B. LE of IIA is higher than IA
- C. LE of IIA is less than IA
- D. IIA provide more binding electron
Explanation
The melting points of Group IIA elements are considerably higher than those of Group IA elements because Group IIA elements (alkaline earth metals) have two valence electrons, providing more 'binding electrons' compared to Group IA elements (alkali metals), which have only one valence electron. The presence of two valence electrons contributes to stronger metallic bonding in Group IIA elements, leading to higher melting points.Additionally, the incorrect options provide explanations based on atomic size and lattice energy, which do not directly relate to the difference in melting points between Group IIA and Group IA elements.
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About s-Block and p-Block Elements
The s and p blocks are studied through their valence-shell configurations, periodic trends and characteristic chemical properties. Work covers the reactions of Group I and Group II elements, the behaviour of Group IV elements, and how atomic size, ionization energy, electronegativity and metallic character change across periods and down groups.
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