Answer:
These four atomic elements are oxygen, carbon, hydrogen, and nitrogen.
Explanation:
hope it helps....
Answer:
Nitrogen/Carbon/Oxygen/Hydrogen
Explanation:
I believe those would be the most important because:
Nitrogen - Composing 78% of earths atmosphere.
Carbon - Building blocks for all known life.
Oxygen - We breath it as well as it composes 21% of our atmosphere.
Hydrogen - Makes up a bunch of compounds (like water) that enable humans to live.
