Which describes the composition of matter in the figure C?

The answer to your question is Mixture

Explanation:

Element is an substance whose atoms are all the same because all the atoms

              have the same number of protons, neutrons and electrons.

Compound is a substance formed when 2 or more atoms combined.

Mixture  is a substance formed by 2 or more different kinds of atomos or

              compounds.

Phase   is a state of matter like solid, liquid or gas.

According to the definitions, we conclude that the figure C is a Mixture.

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.

lol idk man i guess u gotta ask bill nye the science guy