How does electronegativity vary (i) down the group (ii) across the period from left to right ?

How does electronegativity move (a) down the group and (b) across the period from left to right?

How does electronegativity vary down the group 17 and why? How does it vary from left to right in period? Name an element having highest electronegativity.

How does electronegativity vary down the group 17 and why? How does it vary from left to right in period? Name an element having highest electronegativity.

How does ionisation energy vary (a) down the group and (b) along the period from left to right?

How does ionisation energy vary (a) down the group and (b) along the period from left to right?

How does electronegativity of Halogens vary down the group?

How does electronegativity vary in a group and period ?

How electronegativity vary down the group in the periodic table?

How do atomic radii vary (a) down the group and (b) along the period from left to right?

How do atomic radii vary (a) down the group and (b) along the period from left to right?