Electronegativity is used to compare the acidity of atoms in the same row on the periodic table.

Question

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Electronegativity increases across a period (row) on the periodic table, and atoms with higher electronegativity tend to attract electrons more strongly. In the context of acidity, a more electronegative atom within a molecule will stabilize the negative charge of the conjugate base more effectively, making the molecule more acidic. Therefore, electronegativity is a useful parameter for comparing the acidity of atoms in the same row.

Electronegativity Is Used to Compare the Acidity of Atoms in the Same