Check sibling questions

(C) It has been observed that first ionization energy of 5 d series of transition elements are higher than that of 3d and 4d series, explain why? 

 

Answer

  • The transition elements of the 5d series have 4f orbitals which offer 5d electrons very weak shielding from nuclear force. 
  • Hence there is greater effective nuclear charge acting on outer valence electrons. 
  • Hence first ionisation energy of 5 d series of transition elements is higher than that of 3d and 4d series.

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Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths and Science at Teachoo.