Rank the nonmetals in each set from most reactive (1) to least reactive (3). neon: selenium: fluorine

The periodic trend of reactivity depends on whether the elements are metals or nonmetals. For metals, reactivity increases down a group and from right to left across a period. Nonmetals do the opposite. For nonmetals, reactivity increases up a group and from left to right across a period. Therefore, the rank is as follows:

Fluorine

Selenium

Neon

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answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.