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  • Stuck here, help me understand: Halogens are placed in same group because they:

Halogens are placed in same group because they:

  • Option 1)

    Are electronegative

  • Option 2)

    Are most reactive

  • Option 3)

    Are not metals

  • Option 4)

    Have 7 electrons in outermost orbit.

 

Answers (1)

best_answer

As we learnt in

Modern periodic law -

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

-

 

 In the modern periodic table, elements are so arranged that the elements in the same group have the same number of valence electrons. All halogens have 7 electrons in the outermost shell.

 


Option 1)

Are electronegative

This option is incorrect.

Option 2)

Are most reactive

This option is incorrect.

Option 3)

Are not metals

This option is incorrect.

Option 4)

Have 7 electrons in outermost orbit.

This option is correct.

Posted by

Plabita

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