Electronegativity and electropositivity trends in periodic table

Electronegativity and electropositivity trends in periodic table
Video link:
https://youtu.be/_ojmwCHhuJM

1. Electronegativity and Electropositivity T rends in Periodic T able YouTube : Chemistry bright minds https://www.youtube.com/channel/UCzXxV4xER9NIWt316gfeO1w Visit us on Blog: http://chemistrybrightminds.blogspot.com Facebook: https://www.facebook.com/BrightMinds 1

2. What is the Electronegativity ? Electronegativity is the tendency of atom to attract shared pair of electrons to reach the nearest noble gas electronic configuration. The atom that gains electrons turns into negative ion 2 Sodium Electronegativity  is the ability of an atom to attract  electrons  from the outside Electron affinity  is the amount of energy released when an atom gains an  electron .

3. 3 Across period the number of electrons increase within the same shell Decrease in the atomic radius across the period Increase in the electronegativity

4. 4 Moving down a group the number of electrons increase within the same shell Atomic radius increases Electronegativity decreases

5. 5 Pauling  Electronegativity Decreasing size of the atom Increase in the electronegativity Increase size of the atom Decrease in the electronegativity

6. What is the electropositivity : Electropositivity: measure of the ability of the element to donate electrons to reach the nearest noble gas electronic configuration. Atom gives electrons turns into positive ion 6 Sodium Chlorine

7. Ionization energy: Ionization energy is the minimum amount of energy required to remove the most loosely bound electron 7

8. 8 Metals have high electropositivity Non metals have high electronegativity

9. Metals usually lose electrons non-metals gain electrons 9

10. 10 Increasing number of electrons in the same shell Decrease size of atom Period Attraction between nucleus and electrons Increase the electronegativity of elements Increase number of shells and increasing number of electrons Attraction between electrons and nucleus decrease Increasing electro positivity of elements Ionization increases Ionization decreases

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12. Summary: In a period electropositivity decreases because of  increase in ionization  energy along a period. While in a group electropositivity increases because  ionization energy decreases  when we move down in a group . In a period electronegativity increases because of  deceasing atomic radius along a period. While in a group electronegativity decreases because  increasing atomic radius   when we move down in a group. 12

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