Why does electronegativity value increases across a period and decreases down period?
Answers
How does electronegativity affect the strength of an ... - Electronegativity increases from left to right across a period because of the increase of the number of the charges on the nucleus which results in the stronger bonding of the electron pair and electronegativity decreases down the group while moving from top to bottom due to the increase in the distance between the ...
Answer:
Electronegativity increases from left to right across a period because of the increase of the number of the charges on the nucleus which results in the stronger bonding of the electron pair and electronegativity decreases down the group while moving from top to bottom due to the increase in the distance between the nucleus and the valence shell because they decrease the attraction of the electron pair.
- Across a row in the periodic table, the acidic strength increases with the increase in electronegativity. And as we move down the group in the periodic table, the acidic strength increases with the decrease of electronegativity. The reason is that as we move down the group the size of the atom increases due to the addition of new shells and as we move across the period, the size of the atom decreases.