The atmospheric component that remains largely unreactive is _____________.
Argon
Earth's atmosphere consists of: Nitrogen (~78%), Oxygen (~21%), Argon (~0.93%), Carbon dioxide (~0.04%), and traces of other gases.
Argon is a noble gas (Group 18) with a completely filled outer electron shell, making it extremely unreactive under normal conditions.
While Nitrogen is also relatively inert, it does form compounds (ammonia, nitrates) under high energy conditions. Argon has no known stable compounds and does not participate in any atmospheric chemical reactions — it is the most unreactive.
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