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CP Biology Basic Chemistry Quiz Study Guide Name of Particle Name ______________________________ Protons Electrical Charge Positive (p+) Location within the atom Nucleus Neutrons Neutral (n0) Nucleus Electrons Negative (e-) Electron cloud (energy levels) Periodic Table of Elements 8 symbol reactivity 2 bond electrons covalent reactivity positive hydrogen atomic negative The number of protons in an atom is the atomic______ number. The letter that designates each atom on the periodic table is called its symbol_____ The number of protons is equal to the number of electrons_____. (in a neutral atom) The number of valence electrons in the outer shell determine an atom’s reactivity____. To be stable, or unreactive, an atom must have 8_________ valence electrons in its outer shell, with the exception of hydrogen and helium, who only need _2____________. Remember, this is called the octet rule. A toms are held together in compounds by a force called a bond____. A type of bond where electrons are SHARED is called a covalent_________ bond. A. B Match the diagram above to the descriptions below: __A,B,C________ covalent bonds C_________ Chemical Formula _A_______ Structural Formula C. C6H12O6 Word Bank Chemical reaction Coefficient Products Reactants 4 2 6 Use the words and numbers to the right to answer questions referring to the above picture: The arrow represents that a chemical rxn______has occurred. Methane and Oxygen are reactants_ ______ and carbon dioxide and water are products ________. The “2” in front of oxygen and the water molecules is called a _coefficients ________. How many atoms of oxygen exist in the reactants? 4______ How many atoms of oxygen exist in the products? _4__________ How many atoms of Hydrogen exist in the reactants? _4__________ How many atoms of Hydrogen exist in the products? __4__________ Is the equations balanced? YES or NO? _ Y___________