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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

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The correct Answer is:
C
NA
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LAKHMIR SINGH & MANJIT KAUR-PERIODIC CLASSIFICATION OF ELEMENTS-Exercise
  1. The atomic number of an element is 20. In modern periodic table, this ...

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  2. Five elements A, B, C, D and E have atomic numbers of 2, 3, 7, 10 and ...

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

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

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

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

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  8. Which of the following is the valence shell for the elements of second...

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  9. The element which has the maximum number of valence electrons is:

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  10. The correct increasing order of the atomic radii of the elements oxyge...

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  11. The atomic numbers of the elements Na, Mg, K and Ca are 11,12,19 and 2...

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  12. Which of the following are the correct characteristics of isotopes of ...

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  13. The correct formula of the oxide of Eka-aluminium element predicted by...

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  14. The element which can form an acidic oxide should be the one whose ato...

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  15. The element which forms a basic oxide has the atomic number of:

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

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  17. On moving from left to right in a period in the periodic table, the si...

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  18. Which of the following set of elements is written in order of their in...

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  19. The atomic numbers of the three elements X,Y and Z are 2,6 and 10 resp...

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  20. An atom has the electronic structure of 2,7 (a) What is the atomic n...

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