<p> Elements, Compounds & Mixtures Worksheet</p><p>Part 1: Read the following information on elements, compounds and mixtures. Fill in the blanks where necessary.</p><p>Elements (pure substances): 1. A pure substance containing only one kind of ______.</p><p>2. An element is always uniform all the way through (homogeneous).</p><p>3. An element ______be separated into simpler materials (except during nuclear </p><p> reactions).</p><p>4. Over 100 existing elements are listed and classified on the ______.</p><p>Compounds (pure substances): 5. A pure substance containing two or more kinds of ______.</p><p>6. The atoms are ______combined in some way. Often times (but not </p><p> always) they come together to form groups of atoms called molecules. </p><p>7. A compound is always homogeneous (uniform).</p><p>8. Compounds ______be separated by physical means. Separating a </p><p> compound requires a chemical reaction. </p><p>9. The properties of a compound are usually different than the properties of the elements</p><p> it contains. </p><p>Mixtures: 10. Two or more ______or ______NOT chemically combined.</p><p>11. No reaction between substances.</p><p>12. Mixtures can be uniform (called ______) and are known as </p><p> solutions. </p><p>13. Mixtures can also be non-uniform (called ______).</p><p>14. Mixtures can be separated into their components by chemical or physical means.</p><p>15. The properties of a mixture are similar to the properties of its components. Chemistry: Classifying Matter</p><p>Classify each of the materials below. In the center column, state whether the material is a pure substance or a mixture. If the material is a pure substance, further classify it as either an element or compound in the right column. Similarly, if the material is a mixture, further classify it as homogeneous or heterogeneous in the right column. Write the entire word in each space to earn full credit.</p><p>Pure Substance Element, Compound, Material or Mixture Homogeneous, Heterogeneous concrete sugar + pure water (C12H22O11 + H2O) iron filings (Fe)</p><p> limestone (CaCO3) orange juice (w/pulp) Pacific Ocean air inside a balloon aluminum (Al) magnesium (Mg)</p><p> acetylene (C2H2) tap water in a glass soil</p><p> pure water (H2O) chromium (Cr) Chex mix salt + pure water (NaCl + H2O)</p><p> benzene (C6H6) muddy water brass (Cu mixed with Zn)</p><p> baking soda (NaHCO3) Name: ______Hour: ____ Date: ______Chemistry: Classifying Matter</p><p>Classify each of the materials below. In the center column, state whether the material is a pure substance or a mixture. If the material is a pure substance, further classify it as either an element or compound in the right column. Similarly, if the material is a mixture, further classify it as homogeneous or heterogeneous in the right column. Write the entire word in each space to earn full credit.</p><p>Pure Substance Element, Compound, Material or Mixture Homogeneous, Heterogeneous concrete Mixture Heterogeneous sugar + pure water Mixture Compound (C12H22O11 + H2O) iron filings (Fe) Pure Substance Element</p><p> limestone (CaCO3) Pure Substance Element orange juice (w/pulp) Mixture Heterogeneous Pacific Ocean Mixture Heterogeneous air inside a balloon Mixture Homogeneous aluminum (Al) Pure Substance Element magnesium (Mg) Pure Substance Element</p><p> acetylene (C2H2) Pure Substance Compound tap water in a glass Mixture Homogeneous soil Mixture Heterogeneous</p><p> pure water (H2O) Pure Substance Compound, chromium (Cr) Pure Substance Element, Chex mix Mixture Heterogeneous salt + pure water Mixture Homogeneous (NaCl + H2O)</p><p> benzene (C6H6) Pure Substance Compound muddy water Mixture Heterogeneous brass Mixture Homogeneous (Cu mixed with Zn)</p><p> baking soda (NaHCO3) Pure Substance Compound </p>