M.Pt is highest for the elements of group:
Correct answer: D. IVA
- A. IA
- B. IIA
- C. IIIA
- D. IVA
Explanation
The melting and boiling points of IA and IIA group elements decrease from top to bottom due to the increase in their atomic sizes. The binding forces present between large sized atoms are relatively weaker as compared to those between smaller atoms, For elements of group VIIA, which exist in the form of molecules, the melting and boiling points increase down the group, This is because large molecules exert stronger force of attraction due to their higher polarizabilities.
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About Periodic Properties and Trends
Periodic properties arise from electron configuration and effective nuclear charge, producing trends in atomic and ionic radius, ionization energy, electron affinity, electronegativity, metallic character and reactivity. Comparisons run across periods and down groups, with attention to common exceptions. The topic also relates these trends to the behavior of s-block and p-block elements.
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