The acidity of oxides of main group elements increases across a period from left to right.

Name: The acidity of oxides of main group elements increases across a period from left to right.
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This is because as you move from left to right in a period, the valence electrons are added to the same shell, but the nuclear charge increases. This results in a stronger attraction between the positively charged nucleus and the negatively charged oxygen atoms in the oxide, making it more acidic.

The Acidity of Oxides of Main Group Elements Increases Across