Earth's atmosphere is 78%<span> nitrogen </span>21%<span> oxygen, </span>0.9%<span> argon, and </span>0.03%<span> carbon dioxide with very small percentages of other elements.
hope it helps</span>
<span><span><span>Element symbol Element name Ion symbol Cl chlorine Cl1-</span>Anion name chloride ion</span><span><span>Br bromine Br 1-</span>bromide ion</span><span><span>O oxygen O2-</span><span>oxide ion, can u make this the brainliest</span></span></span>
