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the 3rd diagram is a mixture because it has 2 substances

The diagram of the mixture is the third diagram

Explanation:

  • A substance that only has one kind of atom is known as an element.
  • The element cannot be broken down further into simple substances by any physical means.
  • A substance that only has more than one kind of atom is known as a compound.
  • The compound can be broken down further into simple substances by chemical means.
  • The compound has a fixed proportion of atoms of different elements.
  • A substance that only has more than one kind of element or compound is known as a mixture.
  • The mixture can be separated by physical means.

So, from this, we can conclude that from the given particle diagrams, the diagram of the mixture is the third diagram as it has one compound molecule and two atoms of a different element.

Learn more about element, compound, and mixture here:

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