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Solve it, In general ,the properties that decrease and increase down a group in the periodic table ,respectively are :

In general ,the properties that decrease and increase down a group in the periodic table ,respectively are :

 

  • Option 1)

    atomic  radius and electronegativity

  • Option 2)

    electron gain enthalpy and electronegativity

  • Option 3)

    electronegativity and atomic radius

  • Option 4)

    electronegativity and electron gain enthalpy

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Mendeleev's periodic table -

Mendeleev arranged the 63 discovered elements in the periodic table in to 7 horizontal rows known as periods and vertical column known as groups numbered 1 to 8.

-

 

 

Electronegativity and atomic radius -

The attraction between the outer electrons and the nucleus increases as the atomic radius decreases in a period.

- wherein

Electronegativity\propto\frac{1}{atomic\:radius}

 

 

As we know

that as we go down the group electronegativity decreases and atomic radius increases  as we go down the group

 

 


Option 1)

atomic  radius and electronegativity

Option 2)

electron gain enthalpy and electronegativity

Option 3)

electronegativity and atomic radius

Option 4)

electronegativity and electron gain enthalpy

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