Periodic table. Help!

K < Mg < P < O

Explanation:

The trend for electronegativity is that it increases as you go up and to the right of the periodic table. If we look at the periodic table, O is more to the right and up of P and the other elements. Then we see that P is more up and right to the other elements. Then we see that Mg is more up and to the right of K. So we get the order of K < Mg < P < O. Hope this helps!

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