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Question

Which of the following stays unaltered on moving down a group?


A

Number of shells

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B

Number of nucleons

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C

Density

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D

Valence electrons

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Solution

The correct option is D

Valence electrons


  • Number of shells, nucleons and density increase in the elements while going down the group.
  • Number of valence electrons remain the same in all the elements while going down the group.
  • Hence, valence electrons is the correct answer.

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