Lemonade is an example of… a) Element b) Compound c) Mixture d) Molecule
c) Mixture → it’s made of water, sugar, and lemon juice combined physically.
Air that we breathe is best classified as… a) An element b) A compound c) A mixture d) None of these
A mixture → air contains nitrogen, oxygen, carbon dioxide, and other gases mixed together.
Which statement is true? a) All compounds are mixtures b) All mixtures are compounds c) Elements combine chemically to form compounds d) Mixtures always have a fixed ratio of components
c) Elements combine chemically to form compounds
Which of these is an element? a) Water (H₂O) b) Gold (Au) c) Salt (NaCl) d) Sugar (C₆H₁₂O₆)
b) Gold (Au) → because it is made of only one type of atom.
Which of these cannot be broken down into simpler substances by chemical means? a) Iron (Fe) b) Water (H₂O) c) Salt (NaCl) d) Sugar (C₆H₁₂O₆)
a) Iron (Fe) → an element cannot be broken down further.
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