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The electronic configuration of the atom...

The electronic configuration of the atom of an element `X` is `2,8,4`. In modern periodic table, the element `X` is placed in

A

`2^(nd)` group

B

`4^(th)` group

C

`14^(th)` group

D

`8^(th)` group

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The correct Answer is:
C
NA
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LAKHMIR SINGH & MANJIT KAUR-PERIODIC CLASSIFICATION OF ELEMENTS-Exercise
  1. (a) What is a group in the periodic table in which part of a group wou...

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  2. Which of the following statements is not a correct statement about the...

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  3. The electronic configuration of the atom of an element X is 2,8,4. In ...

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  4. The atomic number of an element is 20. In modern periodic table, this ...

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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