Based on its position in the periodic table, which of the following elements is most reactive, helium, carbon, argon, or fluorine

Periodic table is a table that arranges elements based on physical and chemical properties into groups and periods. Non metals reacts by gaining electrons, the ease of gaining electrons determines the reactivity of a non metal. Argon and helium belong to group eight of the periodic table therefore are unreactive (inert), carbon belongs in group thus reacts by gaining 4 electrons while fluorine is a group 7 element and reacts by gaining 1 electron. Therefore, the answer is fluorine,since it requires to gain only one electron.

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