Question

explain electronic configuration in 4th block​

Answer 1

Answer:

Two series of 14 elements, placed at the bottom of periodic table are f-block elements. Their outermost electronic configuration is (n−2)f

1−14

(n−1)d

0−1

ns

2

. Last electron added to these elements is filled in f-orbital. They are even called as inner-transition elements. Lanthanide Series starts from Ce(Z=58)−Lu(Z=71) while Actinides series starts from Th(Z=90)−Lr(Z=103).

Elements after uranium are called as Transuranium Elements.

Explanation:

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Answer 2

Answer:

4th Series of Electronic Configuration:-

Zn, Cd and Hg have their orbitals completely filled both in their ground state and in their common oxidation states and is represented as (n-1) d10 ns2.

So, they are not referred to as transition elements.

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