Elements, compounds and mixtures 1

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Study the following figures where red spheres represent oxygen atoms and white spheres hydrogen atoms.

 

 

Select the figure that represents a single compound.

	Correct. In this figure there are only water molecules, H2O.
	Wrong. In this figure molecules of a compound, water H2O and of an element, oxygen O2 are shown.
	Wrong. This figure only represents a pure element, O2 but not a compound.
	Wrong. This figure represents a mixture of two compounds, water H2O and hydrogen peroxide H2O2.