Electro negativity

Question 1

What is this

And what does it result in

Answer 1

Its is the tendancy of an atom in a covalent bind to oull the bond pair towards itself

This results in a dipole

Question 2

How is electro negativity measured

Answer 2

On a scale from 1-4

4 -highest

Question 3

Which element has the highest electro negetivity

Answer 3

Florine

Question 4

Down a group electro negativity decrees why ?

Answer 4

Down the group atomic radius
increases due to an increase in the number of shells

The bond electrons are far from the positive nucleus resulting in weaker electrostatic force of attraction
hence a weaker pull of elections

This results in a lower electronegativity.

A increase in the number
of electrons between nucleus. and bond electrons resulting
in a greater repulsion hence a weaker pull

Question 5

Across a period electronegativity increses

Why ?

Answer 5

Acrossa period there is an increase in the number of protons on the nuclues

This results in a greater positive charge hencea stornger
electrostatic force of
Attraction for the bond pair
hense a Stronger pull

In addition to that
atomic radius decreases across a period -

The bond pair is closer to the
Radius resulting in a greater
force of attraction . This resuts in a greater pull and a higher electronegativity