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The fifth period (n = 5) beginning with ...

The fifth period `(n = 5)` beginning with rubidium is similar to the fourth period and contains the `4d` transition series starting at

A

scandium

B

yttrium

C

lanthanum

D

actinium

Text Solution

Verified by Experts

The correct Answer is:
B
Yttrium with the configuration `[Kr]4d^(1)5s^(2)` in the first element of the `4d` transition series.
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R SHARMA-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN ELEMENTS-Follow-up Test
  1. The third period (n = 3) involves the filling up to electrons inelemen...

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  2. The fourth period (n = 4) does not involve the filling up of electrons...

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  3. The fifth period (n = 5) beginning with rubidium is similar to the fou...

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  4. The sixth period (n = 6) of the periodic table contains 32 elements an...

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  5. Which of the following lanthanoids does not contain 5d electron in its...

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  6. Which of the following actinoids contains 6d^(2) electrons its valence...

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  7. Which of the following groups of periodic table contains maximum numbe...

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  8. In s-block elements, the differentiating electron enters the orbital.

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  9. On the basis of chemical behavior, how many element belong to the s-bl...

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  10. A1though the elements in the periodic table are arranged according to ...

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  11. Which of the following elements is placed on its own in the table to i...

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  12. In p-block elements, theorbitals are successively filled.

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  13. The general valence shell electronic configuration of p-block elements...

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  14. How many elements belong to the p-block of the periodic table on the b...

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  15. For many years, the group 18(VIIIA) elements were called intert gases ...

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  16. p-block elements mostly fromcompounds.

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  17. Which of the groups of p-block contains the maximum number of metals?

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  18. Groups corresponding to the progressive filling of the ns and np orbit...

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  19. d-blcok elements are the elements in which the differentiating electro...

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  20. The general valence shell electronic configuration of transition eleme...

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