what is the general trend in electronegtivity down a family of elements?

Question

how do you account for this?

Answer 1

electronegativity decreases down the group of any group.

down the group of any group, the number of electron shells always increases. this sets up a screening effect of the nuclear charge (positive) for any electrons(negative) that want to be attracted to the atom.

the measure of attraction for an electron, also known as electronegativity, is decreased because this electron is discouraged from entering the atom by 2 factors. firstly, the atomic radius increases,so there is less nuclear attraction for the new electron. secondly, the screening effect of multiple electron shells increases along with the number of shells.

Answer 2

electronegativity is the measurement of nuclear attractive forces on the bonded electrons. As we move down the group atomic size increases which means lesser attractive force on the bonded electrons by nucleus.thus electronegativity decreases down a family.
Though there are some exceptions also.

Answer 3

electronegativity decreases down the group of any group.
this is bcoz atomic size increases in a group so,nuclear charge decreses so tendency to attract electrons decreses

Answer 4

the bigger the element gets the more distant the valence electrons get. F is the most electronegative and Fr the least.