QAChemistry › Which element is the most reactive?

Which element is the most reactive?

A. sodium

B. nickel

C. carbon

D. oxygen


Answer: A. sodium

Sodium is the most reactive element in the options listed. With an atomic number of 11, sodium is ready to give out one electron to create a fully stable L shell and attain an octet state. When this electron is given out, it makes sodium a cation, therefore, becoming very reactive due to the positive charge. This valency of sodium tends to make it extra reactive.

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