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All the elements in a group in the perio...

All the elements in a group in the periodic table have the same

A

electronic configuration

B

number of electrons in the valence shell

C

atomic number

D

atomic weight

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The correct Answer is:
b
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SURA PUBLICATION-PERIODIC CLASSIFICATION OF ELEMENTS-ADDITIONAL CHOOSE THE CORRECT ANSWER
  1. The elements in which extra electrons enters into (n-2) f-orbitals are...

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  2. The element with atomic number 31 belongs to

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  3. All the elements in a group in the periodic table have the same

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  4. Which pair of elements has the same characteristic chemical properties...

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  5. The IUPAC name of element having atomic number 108 is

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  6. Which among the following has the highest ionisation energy.

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  7. Arrange the following ions in order of decreasing ionic radii He, Li^(...

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  8. Assertion (A) : He and Be have similar outer shell electronic configur...

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  9. Which one among the following species has the largest atomic radius ?

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  10. The correct order of size among Br^(+), Br, Br^(-)

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  11. The elements having highest ionization energies within their periods a...

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  12. Across the period , Ionisation energy

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  13. Statements I : Ionisation energy of fluorine is greater than oxygen. ...

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  14. Which of the following statements are correct? (i) Helium has the ...

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  15. Which of the following factor decreases across the period ?

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  16. Ionisation enthalpy is an process

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  17. The effective nuclear charge across the period (from left to right)

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  18. Which of the following N^(3-),O^(2-),F^(-) is largest in size?

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  19. The radii of F, F^(-) , O andO^(2-) are in the order

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  20. Which of the following atom has the lowest ionization enthalpy?

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