Question

What are the four most important elements on earth?

hellum
carbon
water
nitrogen
O oxygen
hydrogen

Answer 1

Nitrogen/Carbon/Oxygen/Hydrogen

Step-by-step 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.

Answer 2

These four atomic elements are oxygen, carbon, hydrogen, and nitrogen.

Step-by-step explanation:

hope it helps....