Trends electronegativity in periodic table with size,position on chemtopper

Two major Factors controlling the electronegativity of elements

in the periodic table :

1) Size of the element in the periodic table

2)Position of element in periodic table means closeness to noble gases.

Electronegativity trends part 2 video will help you in understanding the variation of electronegativity in periodic table.

You will get answers of all questions listed below:

Why electronegativity decreases down the group?

Why electronegativity increases along the period?

Variation of electronegativity with atomic size in periodic table

Change in electronegativity as the metallic character increases or decreases

Change in electronegativity as the non metallic character increases or decreases

Why metals are less electronegative than nonmetals?

Why alkali metals are the least electronegative elements of their respective periods in periodic table

Why halogens are the most electronegative elements of their respective periods in periodic table

Which element has the highest value of electronegativity and which element has the lowest value of electronegativity?

And many many more questions you will be able to answer after watching video Trends of Electronegativity in periodic table Part 2

Atomic size and periodic trends in electronegativity

**Big atoms are less electronegative than small atoms**

Smaller the atom higher the electronegativity and bigger the atom lesser is electronegativity.

Atomic size down the group increases in the periodic table And along the period atomic size decreases

So it means electronegativity down the group is decreasing and along the period is increasing

**Change in electronegativity with change in atomic size and closeness to noble gases**

Cesium (Cs) is considered as biggest atom with least value of electronegativity .

Fluorine (F) is considered as smallest atom with highest value of electronegativity.

Metals and non metals :

**Alkali metals are least electronegative and halogens are most electronegative in their respective periods**

What is the basic difference in metals and nonmetals?

Metals lose electrons to get the nearest noble gas configuration and non metals gain electrons to get the nearest noble gas configuration.

Size and metallic nature of elements in periodic table

Bigger the size of the atom more it has tendency to lose electron because valence electrons are more away from the nucleus and less tightly held.Hence less energy is required to remove electron and atoms become more metallic in nature.

Size and Non -metallic nature of elements in periodic table

Smaller the size of the atom less it has tendency to lose but more tendency to gain electrons because valence electrons are close to the nucleus and more tightly held by the nucleus .Hence it becomes easy to add an electron and atoms become more non metallic in nature.

**Electronegativity ,metallic and non metallic character**

Variation of metallic character and electronegativity in periodic table down the group and along the period :
Down the group —->atomic size increases —–>

metallic character increases —>Electronegativity decreases

Along the period–> atomic size decreases–>

Metallic character decreases–>Electronegativity increases

Variation of non metallic character and electronegativity in periodic table down the group and along the period :

Down the group —->atomic size increases —–>

Non metallic character decreases —>Electronegativity decreases

Along the period–> atomic size decreases——>

Non metallic character increases—–>Electronegativity increases

Electronegativity and Closeness to the Noble gases

Nonmetals closest to Noble gases are the most electronegative and metals closest to Noble gases are the least electronegative.

**Metals are less electronegative and non metals are more electronegative**

Very reactive nonmetals halogen and very reactive metals alkali metals are

closest to the noble gases.

Halogens are most electronegative in their respective periods as they are smallest in size in their respective periods and closest to noble gases also.

Alkali metals are least electronegative in their respective periods as they are biggest in size in their respective periods and closest to noble gases also.

Watch the video Trends of electronegativity with atomic size and position in the periodic table (EN part 2 ) for understanding the reasoning behind electronegativity trends in the periodic table.

Trends of electronegativity with atomic size and position in the periodic table (EN part 2 )