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Without looking at the periodic table, s...

Without looking at the periodic table, select the elements belonging to same from the following list.

A

Z=12,38,4, 88

B

Z=9,16,3,35

C

Z=5,11,27,19

D

Z=24,47,42,55

Text Solution

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The correct Answer is:
A
They have same valance shell configuration or their atomic numbers should differ by magic their atomic numbers differe by magic no. 2,8,8,18,32
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DINESH PUBLICATION-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES-All Questions
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  8. The element with atomic number 56 belongs to which block ?

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  10. The first ionisation energy of Al is smaller than that of Mg because :

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  11. The second ionisation potential is

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  12. Which of the elements show least values of ionisation enthalpy within ...

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  14. Which of the following process requires the largest amount of energy ?

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  15. From the ground state electronic configuration of the elements given ...

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  17. The power of an atom to attract the shared pair in a molecule:

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  19. Which of the following has the largest ionisation energy.

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