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An atom has electronic configuration 1s^...

An atom has electronic configuration `1s^(2) 2s^(2) 2p^(6) 3s^(2) 3P^(6) 3d^(3) 4s^(2)` . In which group wouold it be placed ?

A

Fifth

B

Fifteenth

C

Second

D

Third

Text Solution

Verified by Experts

The correct Answer is:
A
The electronic configuration clearly suggest that it is a d-block element (having configuration `(n-1)d^(1-10)ns^(0-2))` which starts from III B and goes till II B. Hence with `d^(3)` configuration it would be classified in the group.
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DISHA PUBLICATION-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES-Exercise -1 :Concept Builder (Topic 1)
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  6. Element with atomic number belongs to the period.........and the group...

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  7. Which of the following is the atomic number of a metal?

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  8. The element having the electronic configuration [Kr] 4d(10) 4f^(14) 5s...

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  9. The element with atomic number 118, will be

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  10. If the atomic number of an element is 33, it will be placed in the per...

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  11. Eka-aluminium and Eka -silicon are known as :

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  12. Which of the following remains unchanged in descending in a group in t...

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  14. An atom has electronic configuration 1s^(2) 2s^(2) 2p^(6) 3s^(2) 3P^(6...

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  15. The statement that is not correct for the periodic classification of e...

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  16. The elements in which 4f orbitals are progressively field up are calle...

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  17. The statement that is not correct for the periodic classification of e...

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  18. The number of elements in each of the inner transition series is

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  19. Which of the following elements is a lanthanide (Rare-earth element) ?

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  20. Which of the following is the artificial element in the periodic table...

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