Which is not a compound? silicon dioxide

oxygen gas

carbon dioxide gas

water

oxygen. there you go my answer need s to be 20 characters long

Oxygen Gas

Explanation:

A compound forms whenever two or more atoms form chemical bonds with each element or substance.

Hope it helps!

disposable safety razors<

electric shaver

all of the above

the aorta is the large artery leaving the heart branches into smaller arteries, which eventually branch into capillaries.the arteries carry oxygen and nutrients away from your heart, to your body's tissues. the capillaries are small, thin blood vessels that connect the arteries and the veins. the statement that arteries carry oxygen-rich blood to capillaries is true. veins on the other hand are blood vessels that take oxygen-poor blood back to the heart.