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Please help! Which pair of elements belongs to same group

Which pair of elements belongs to same group

  • Option 1)

    Elements with atomic No. 17 and 28

  • Option 2)

    Elements with atomic No. 20 and 40

  • Option 3)

    Elements with atomic No. 17 and 53

  • Option 4)

    Elements with atomic No. 11 and 33

 
Answers (1)
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V Vakul

 

Modern periodic law -

The physical and chemical properties of elements are periodic functions of their atomic number.

-

 

 Atomic number 17: Chlorine

Atomic number 53: Iodine

Clearly they both belongs to the same group called halogen


Option 1)

Elements with atomic No. 17 and 28

Incorrect

Option 2)

Elements with atomic No. 20 and 40

Incorrect

Option 3)

Elements with atomic No. 17 and 53

Correct

Option 4)

Elements with atomic No. 11 and 33

Incorrect

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