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Electronic configuration of a transition...

Electronic configuration of a transition element (X) in + 3 oxidation state is `[Ar]3d^(5)`. What is its atomic number -

A

25

B

26

C

27

D

24

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Verified by Experts

The correct Answer is:
B
`x^(3+)` HAS THE ELECTRONIC CONFIGURATION `[Ar]3d^(5)`. So it has `18+5=23` electrons. Therefore, X - atom has `23+3=26` electrons , and hence, its atomic number is 26.
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CHHAYA PUBLICATION-D - AND F - BLOCK ELEMENTS -SOLVED NCERT EXEMPLAR PROBLEMS (Multiple Choice Question)
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  3. Metallic radii of some transition elements are given below. Which of t...

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  6. The magnetic nature of elements depends on the presence of unpaired el...

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  7. Which of the following oxidation states is common for all lanthanoids ...

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  8. Which of the following reactions are disproportionation reactions - ...

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  10. There are 14 elements in actinoid series. Which of the following eleme...

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  11. KMnO(4) acts as an oxidising agent in acidic medium. The number of mol...

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  14. Interstitial compounds are formed when small atoms are trapped inside ...

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  15. The magnetic moment is associated with its spin angular momentum and o...

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  16. KMnO(4) acts as an oxidising agent in alkaline medium. When alkaline K...

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  19. Highest oxidation state of manganese in fluoride is + 4 (MnF(4)) but h...

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  20. Although zirconium belongs to 4d transition series and hafnium to 5d t...

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