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A transition metal X has a configuration [Ar] 3d4 in its +3 oxidation state. What is its atomic number?:

  • Option 1)

    25

  • Option 2)

    26

  • Option 3)

    22

  • Option 4)

    23

 

Answers (1)

best_answer

As we learnt in 

'd' Block in periodic table -

In periodic table, the 'd' block elements are present between s and p block elements by the position and the three rows of transition metal are  3d 4d 5d, the 6d series is still incomplete.

- wherein

21^{Sc}\Rightarrow 3d^1\:4s^2

39^{Y}\Rightarrow 4d^1\:5s^2

57^{La}\Rightarrow 5d^1\:6s^2

89^{Ac}\Rightarrow 6d^1\:7s^2

 

Atmoic number of Ar is 18. Add 4 for the the d-electrons. Then add 3 more for the Oxidation state. 

Hence, Atomic no. = 18+4+3 = 25

 

 


Option 1)

25

This answer is correct

Option 2)

26

This answer is incorrect

Option 3)

22

This answer is incorrect

Option 4)

23

This answer is incorrect

Posted by

divya.saini

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