Question

Electron configuration of a transition element X in+3 oxidation state is[Ar] 3d5.what is it's atomic number

Answer 1

Answer:atomic no. is 26 and element is Iron (Fe).

Explanation:

There is +3 oxidation state means no.of loss of electrons is 3, and that 2 electrons are released from 4s2 orbital and 1electron from 3d orbital to attain half filled stability.

Therefore, Ar has 18 electrons and 5 electrons in 3d orbital as per given.

So total no. Of electrons= 18+5+3 ( loss of electrons) = 26 electrons

Which means atomic no. Is 26 and element name is Iron.

Answer 2

Answer:

26

Explanation:

the electronic configuration is ar 3d5 this implies it has 23 electros and it is given that it is +3 state this implies it has 23+3 electrons that is 26 electrons no. of electrons=no. of protons=atomic no.

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