Question

write the electionic configuration 57
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Answer 1

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The atomic no 57 is of Lanthanum .

The electronic configuration is 2,8,18,18,9,2.

In shell K2,L8,M18,N18,O9,P2 .

Answer 2

Answer:

electronic configuration of 57 is

atomic number 57 is of Lanthanum

electronic configuration is 2 , 8 , 18 , 18 , 9 , 2.

In Shell :- K2 , K8 , M18 , N18 , O9 , P2 .

Explanation:

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