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Arun Jangir posted an Question
September 02, 2021 • 22:46 pm 30 points
  • IIT JAM
  • Chemistry (CY)

26. for s and p valence orbitals, overlap decreases on (group of periodic table while (bis tnue for the transition metals. that is why the heat of atomisation o

26. For s and p valence orbitals, overlap decreases on (group of periodic table while (Bis tnue for the transition metals. That is why the heat of atomisation of the main group metals C)with increasing atomic numbers while (8 rend is observed for transition metals. Here .® and respectively are: (1) ascending. opposite, increases 12/4 (2) descending, opposite, falls (3) descending. the same. goes up (4) ascending. the stome. fall (10) (Continued)

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    Paramjeet verma best-answer

    option(2) On moving down the group effective overlap decreases because of s and p orbitals are involved in bonding which more towards nucleus. while d orbitals are mainly involved in bonding for transition metals. Consequently heat of atomisation (lesser energy is required to break bond) also decreases on increasing atomic number (less bond strength) due to poor overlapping of s and p orbitals.

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