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Name_____________________________ Date_____________ Hour_______ Matter Unit Review Test Date______________ Choose the BEST definition for the matter vocabulary. 1. ______ atom 2. ______ proton 3. ______neutron 4. ______electron 5. ______nucleus 6. ______element 7. ______atomic number 8. ______atomic mass 9. ______group/family 10. ______period 11. ______chemical properties 12. ______physical properties 13. ______chemical equation 14. ______ exothermic 15. ______endothermic 16. ______products 17. ______reactants a. The new substance(s) that result from a chemical reaction b. The original substance(s) at the beginning of a chemical reaction c. A way to represent a chemical reaction by using symbols for the substances involved in the change d. A chemical reaction that absorbs heat energy e. A chemical reaction that gives off heat energy f. Negatively charged particle that orbits the nucleus of an atom. g. Positively charged particle found in the nucleus of an atom. h. The central part of an atom that is made up of protons and neutrons. i. The smallest component that makes up an element. j. Neutrally charged particle found in the nucleus of an atom. k. Elements that share similar characteristics and reactive behaviors. l. A substance that is in its purest form and cannot be broken down chemically into another substance. m. Describes the number of protons plus the number of neutrons found in the nucleus of an atom. n. Describes the number of protons in the nucleus of an atom. o. The Rows of elements organized by increasing atomic number. p. Describes how substances are pre-determined to interact with each other. q. Describes properties of a substance without changing the identity of the substance Answer the following questions (use a separate sheet of paper if necessary). 1. When we did the chemical reaction in a bag, was it an endothermic or exothermic reaction? How did you know? 2. In the chemical equation below, label the products and reactants. Explain how you know. NaHCO3 + CaCl2 → Ca(HCO3)2 + NaCl 3. What does the arrow represent in the above chemical equation? 4. In the Cabbage Chemistry lab, the cabbage was a _______________ because it changed the color of a substance to determine its pH. 5. Most elements on the periodic table are which of the following? a) gases b) metallic solids c) liquids 6. Explain the reactivity of the "Noble Gases," the elements on the right side of the periodic table. 7. The chemical formula for water is H20. Identify the correct number of atoms for this compound. 8. List signs that a chemical change has occurred. True or False 1. 2. 3. 4. __________Everything on earth is made of a combination of man-made elements. __________An example of a physical property is density. __________An example of a chemical property is odor. __________A compound is a molecule with just one atom. Identify the following as a physical property (P) or a chemical property (C). 1. _________mass 2. _________color 3. _________reactivity 4. _________flammability 5. _________melting point Identify the following as a physical change (P) or a chemical change (C). 1. __________tearing paper 2. __________burning paper 3. __________water boiling 4. __________rust forming 5. __________baking bread