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The electronic configuration of a transi...

The electronic configuration of a transition element in +3 oxidation state is `[Ar]3d^(7)`. Find out its atomic number.

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Configuration `[Ar]3d^(7)` means `18 + 7 = 25` electrons. That means the number of electrons in the atom of the element `= 25 + 3 = 28`.
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U-LIKE SERIES-THE D-AND F-BLOCK ELEMENTS -VERY SHORT ANSWER QUESTIONS (1 mark each)
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  6. Which property of the transition elements makes them good catalysts ?

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  7. What is the effect of increasing pH on K(2)Cr(2)O(7) solution ?

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  8. Why is third ionisation energy of manganese [Atomic number = 25] unexp...

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  9. Why is electronic configuration 1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)4s^(2)3d...

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  14. Why do most transition metal ions show variable oxidation states ?

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  15. Why is Ce^(4+) in aqueous solution a good oxidising agent?

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  17. Why do Zr and Hf exhibit similar properties?

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