Question

types of pure substances
elements: made of only one type of atom.
compounds: made of two or more elements bonded.
use the answer bank to classify each substance below:
silver
water (h₂o)
oxygen
answer bank
element
compound

Explanation:

Silver is made of only silver - atoms, so it is an element. Water ($H_2O$) is made of hydrogen and oxygen elements bonded together, so it is a compound. Oxygen gas ($O_2$) is made of only oxygen - atoms, so it is an element.

Answer:

Silver: Element
Water: Compound
Oxygen: Element