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Karnataka Board PUCPUC Science 2nd PUC Class 12

Electronic Configurations of the d-block Elements

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Estimated time: 10 minutes
CBSE: Class 12

Key Points: Electronic Configurations of the d-block Elements

Electronic Configuration:

  • The general electronic configuration of 3d-series elements is \[3d^{1-10}4s^{1-2}\].
  • The general electronic configuration of 4d-series elements is \[4d^{1-10}5s^{1-2}\].
  • The general electronic configuration of 5d-series elements is \[5d^{1-10}6s^{1-2}\].
  • The general electronic configuration of 6d-series elements is \[6d^{1-10}7s^{1-2}\]. 
  • All transition elements are d-block elements, but all d-block elements are not transition elements. Zn, Cd and Hg are not transition elements.
3d-Series At. No Outer E.C 4d-Series At. No Outer E.C 5d-Series At. No Outer E.C 6d-Series At. No Outer E.C
Sc 21 3d¹4s² Y 39 4d¹5s² La 57 5d¹6s² Ac 89 6d¹7s²
Ti 22 3d²4s² Zr 40 4d²5s² Hf 72 5d²6s² Rf 104 6d²7s²
V 23 3d³4s² Nb 41 4d⁴5s¹ Ta 73 5d³6s² Db 105 6d³7s²
Cr 24 3d⁵4s¹ Mo 42 4d⁵5s¹ W 74 5d⁴6s² Sg 106 6d⁴7s²
Mn 25 3d⁵4s² Tc 43 4d⁵5s² Re 75 5d⁵6s² Bh 107 6d⁵7s²
Fe 26 3d⁶4s² Ru 44 4d⁷5s¹ Os 76 5d⁶6s² Hs 108 6d⁶7s²
Co 27 3d⁷4s² Rh 45 4d⁸5s¹ Ir 77 5d⁷6s² Mt 109 6d⁷7s²
Ni 28 3d⁸4s² Pd 46 4d¹⁰5s⁰ Pt 78 5d⁹6s¹ Ds 110 6d⁸7s²
Cu 29 3d¹⁰4s¹ Ag 47 4d¹⁰5s¹ Au 79 5d¹⁰6s¹ Rg 111 6d¹⁰7s¹
Zn 30 3d¹⁰4s² Cd 48 4d¹⁰5s² Hg 80 5d¹⁰6s² Cn 112 6d¹⁰7s²

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D and F Block Elements part 9 (Electronic Configuration) [00:13:03]
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