Electronegativity across a period increases and Electronegativity down a group decreases.
What is Electronegativity ?
Electronegativity, symbolized as χ, is the tendency for an atom of a given chemical element to attract shared electrons when forming a chemical bond.
An atom's electronegativity is affected by both its atomic number and the distance at which its valence electrons reside from the charged nucleus.
On the periodic table, electronegativity generally increases as we move from left to right across a period and decreases as you move down a group.
As a result, the most electronegative elements are found on the top right of the periodic table, while the least electronegative elements are found on the bottom left.
Hence, Electronegativity across a period increases and Electronegativity down a group decreases.
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