<p>Name: ______Key______Date:______</p><p>Chapter 2 Study Guide</p><p>1.) Chlorine, a toxic yellow-green gas, has the ability to combine with sodium and oxygen in a 1:1:1 ratio to form the compound sodium hypochlorite, better known as, “bleach”. Draw the particle diagram of chlorine at room temperature.</p><p>2.) Which of the following are substances, and which are not:</p><p> a.) Sodium chloride Is a substance</p><p> b.) Saline solution Not a substance (it is a homogeneous mixture) </p><p> c.) Magnesium Is a substance</p><p> d.) Tap water Not a substance (it is a homogeneous mixture)</p><p> e.) Pizza Not a substance (it is a heterogeneous mixture)</p><p>3.) Label the following as chemical or physical properties:</p><p> a.) Irons ability to rust Chemical property</p><p> b.) Waters ability to freeze Physical property</p><p> c.) Papers ability to rip Physical property</p><p> d.) Sodium’s ability to react violently with water Chemical property 4.) What is conserved during a chemical reaction? </p><p>At this point of the school year, you are aware of the fact that mass is conserved during a </p><p> chemical reaction…meaning that the mass of your reactants equals the mass of the </p><p> products formed. However, by the end of the school year, you need to be aware that </p><p> charge and energy are conserved as well .</p><p>5.) Define the following and give an example of each:</p><p>Element: </p><p>A pure chemical substance consisting of a single type of atom, that cannot be broken</p><p> down by physical or chemical means. Elements can be found in your reference table, on</p><p> the periodic table. Example are, but are not limited to, hydrogen, helium, lithium,</p><p> beryllium, boron, etc…</p><p>Compound: </p><p>A pure chemical substance consisting of two or more different chemical elements that </p><p> can be separated into simpler substances by chemical reactions. Examples are, but are </p><p> not limited to, sodium chloride, water, sodium bicarbonate, aluminum oxide, etc…</p><p>Homogeneous Mixture: </p><p>A mixture that is uniform throughout (it only has one phase). An example of a </p><p> homogeneous mixture is a salt that has completely dissolved in water. Remember, </p><p> homogeneous mixtures are solutions.</p><p>Heterogeneous Mixture: </p><p>A mixture that is not uniform throughout (consists of more than one phase. An example </p><p> of a heterogeneous mixture is a mixture of oil and water.</p>