Answer:
The answer to your question is Element
Explanation:
Element is a substance whose atoms are all the same because of 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 atoms or
compounds.
Phase is a state of matter like solid, liquid or gas.
According to the definitions, we conclude that the figure is an Element.
