Which of the following is a compound

In the following images, the white spheres represent hydrogen atoms and the red spheres represent oxygen atoms. classify each sample as an element, a compound, or a mixture.

Which term describes a pure substance that is made up of only one type of atom?

What is the correct classification of a mixture in which both a solid and a liquid are visible?

Unlike an element, a(n) ________ may be separated through a physical process like filtration.

One particular type of atom and it cannot be broken down into a simpler substance