The property which increases upto group IV-A then decreases on wards_______________?
Correct answer: C. Melting & boiling points
- A. Ionization energy
- B. Atomic radii
- C. Melting & boiling points
- D. Atomic volume
Explanation
Across a period, melting and boiling points generally rise as stronger metallic or covalent network bonding develops, reaching a maximum near Group 14, then fall toward the molecular noble gases. Students often choose a, ionization energy, but ionization energy does not show this rise-to-Group-14 then fall pattern across the period.
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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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