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The elements A, B, C, D and E have atomi...

The elements A, B, C, D and E have atomic number 9, 11, 17, 12 and 13 respectively. Which pair of elements belongs to the same group ?

A

A and B

B

B and D

C

A and C

D

D and E

Text Solution

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The correct Answer is:
C
Explanation : Elements having the same number of valence electrons belong to the same group. Given elements and their electronic configurations are written below :

Since, both A and C elements have the same number of valence electrons which is 7, therefore, they belong to the same group, that is, 17th group of periodic table.
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OSWAL PUBLICATION-PERIODIC CLASSIFICATION OF ELEMENTS -NCERT EXEMPLAR (MULTIPLE CHOICE QUESTIONS)
  1. Which of the following statements about the Modern Periodic Table is C...

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  2. Which of the given elements A,B,C,D and E with atomic number 2,3,7,10 ...

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  3. The elements A, B, C, D and E have atomic number 9, 11, 17, 12 and 13 ...

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  4. Where would you locate the element with electronic configuration 2, 8 ...

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  5. An element which is an essential constituent of all organic compounds ...

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  6. Which of the following is the outermost shell for elements of period 2...

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  7. Which one of the following elements exhibit maximum number of valence ...

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  8. Which of the following gives the correct increasing order of the atomi...

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  9. Which among the following elements has the largest atomic radii ?

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  10. Which of the following elements would lose an electron easily ?

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  11. Which of the following elements does not lose an electron easily ?

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  12. Which of the following are the characteristics of isotopes of an eleme...

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  13. Arrange the following elements in the order of their decreasing metall...

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  14. Arrange the following elements in the order of their increasing non-me...

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  15. What type of oxide would Eka- aluminium form?

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  16. Three elements B, Si and Ge are

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  17. Which of the following elements will form an acidic oxide ?

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  18. The element with atomic number 14 is hard and forms acidic oxide and a...

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  19. Which one of the following depict the correct representation of atomic...

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  20. Which one of the following does not increase while moving down the gro...

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