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Why does a calcium atom have a higher electronegativity than a potassium atom?

Quote from: prasamb@yahoo.com on April 17, 2023, 12:00:10 AM
Why does a calcium atom have a higher electronegativity than a potassium atom?

Electronegativity decreases down the group as atomic size increases. So Mg is more electronegative than Calcium due to small size it has more attraction for shared electrons.