1) It contains only one kind of atom. a) Element b) Compound c) Mixture d) Molecule 2) It contains two or more atoms combined. a) Compound b) Element c) Mixture 3) Air is a ____________ a) Element b) Compound c) Mixture d) Energy 4) Elements can be broken down into simpler substances. a) True b) False c) Sometimes 5) Carbon, Silicon, Gold are examples of ________ a) Elements b) Compounds c) Mixtures 6) Is sugar (C12H22O11) an element or a compound? a) Element b) Compound c) None of these 7) Which of the following represents an element? a) H2O b) H2 c) NaCl d) CaCO3 8) Which of the following is not a compound? a) Cl b) HCl c) NaCl d) KCl 9) The chemical formula for Sodium hydroxide is a) SOH b) NaOH c) NAOH d) Na(OH)2 10) In the diagrams provided, the circles of different colors represent the atoms of different elements. Which diagram represents a mixture? a) I b) II c) III d) IV 11) Sam's mother is cooking breakfast in a cast-iron frying pan. If the pan is made only of iron, what can Sam conclude? a) The pan is a pure substance with the chemical symbol Ir. b) The pan is a pure substance with the chemical symbol F. c) The pan is a pure substance with the chemical symbol I. d) The pan is a pure substance with the chemical symbol Fe. 12) A mixture that appears to be evenly mixed throughout: a) an atom b) a compound c) a homogeneous mixture d) a heterogeneous mixture 13) A pure substance... a) is a compound or a mixture b) is an element or a compound c) is an element or a mixture d) is a mixture 14) Diagram "a" is an example of  a) element b) mixture c) compound 15) Which of the following is an example of the formation of a mixture? a) Rust forming on an iron nail. b) Sodium and chlorine forming table salt. c) Hydrogen and oxygen reacting to produce water. d) Sugar crystals dissolving in water.

Elements, Compounds and Mixtures

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