- #1
gemma786
- 29
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Hi
I have questions related to the electronic configurations of elements of d and f-block.
First I want to ask a question about the E.C. of Lanthanium. This element has E.C. [Xe]5d16s2, but according to Bohr-Bury rule 4f-orbitals should be filled prior to 5d-orbital and then Lanthanium’s E.C. should be [Xe]4f16s2, isn’t? AND this is also the case with Gadolinium in which one electron is promoted to 5d orbital leaving behind half filled 4f-subshell.
AND when we go through the electronic configurations of Actinoids why we find so many ambiguity in their electronic configurations?
At last, suppose effective nuclear charge increases by same amount for 3d , 4d and 5d orbitals for different atoms then in which of these orbitals does the orbital energy will decrease most?
I have questions related to the electronic configurations of elements of d and f-block.
First I want to ask a question about the E.C. of Lanthanium. This element has E.C. [Xe]5d16s2, but according to Bohr-Bury rule 4f-orbitals should be filled prior to 5d-orbital and then Lanthanium’s E.C. should be [Xe]4f16s2, isn’t? AND this is also the case with Gadolinium in which one electron is promoted to 5d orbital leaving behind half filled 4f-subshell.
AND when we go through the electronic configurations of Actinoids why we find so many ambiguity in their electronic configurations?
At last, suppose effective nuclear charge increases by same amount for 3d , 4d and 5d orbitals for different atoms then in which of these orbitals does the orbital energy will decrease most?