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प्रश्न
Electronic configuration of a transition element X in +3 oxidation state is [Ar]3d5. What is its atomic number?
विकल्प
25
26
27
24
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उत्तर
26
Explanation:
[Ar]3d5 : As X3+ is formed by the loss of 3 electrons, the configuration of element X is [Ar] 3d6 4s2.
∴ Atomic number = 26.
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संबंधित प्रश्न
Which of the following cations are coloured in aqueous solutions and why ?
Sc3+, V3+, Ti4+, Mn2+ (At. Nos. Sc = 21, V = 23, Ti = 22, Mn = 25)
|
`E_((M^(2+)/M)` |
Cr | Mn | Fe | Co | Ni | Cu |
| -0.91 | -1.18 | -0.44 | -0.28 | -0.25 | -0.34 |
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