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Which region of the periodic table contains the most chemically active nonmetals?
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The geochemical cycle.
The most chemically active nonmetals are located in the upper right-hand region of the periodic table.1
These elements possess relatively large ionization energies, which drives their strong tendency to gain electrons during chemical reactions. Within this region, Group 17, known as the halogens, are particularly notable for their high reactivity. Among all elements, fluorine is the most chemically active.12