According to the periodic table arrangement of the elements in each set in order of decreasing electronegativity is As>Ga>Ca.
The periodic table's trend for electronegativity is as follows: Atoms' electronegativity rises as you walk through a period from left to right. Moving down a group in the periodic table from top to bottom results in a decrease in the electronegativity of atoms. As has the highest electronegativity because it is in group 5 period 4, followed by Ga, which is in group 3 period 5, and Calcium, which is present in group 2, period 5. This is because electronegativity rises from left to right within a period. As>Ga>Ca is given as the trend.
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