Chapter 123 - EXAM I CHM 151IN (morning) NAME: _key_ 1....

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EXAM I CHM 151IN (morning) NAME: _____________________key________________________________ 1. Using the conversion sheet, perform the following conversions: (10pts) a. 245ml to L b. 4.8 x 10 -3 m to in c. 3.00 x 10 -8 m/s to Km /hr d. 1.10 g/ml to lbs/L e. 4.0 × 10 −10 m to nm
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2. Explain the difference between a chemical and a physical change in matter. Give one example of each. (6pts) During a chemical change, atoms are rearranged in matter to produce new types of molecules. During a physical change, matter retains its molecular structure, but changes phase. 3. Tell the number of protons neutrons and electrons in the following atoms: (4pts) a. Carbon -13 6protons, 7neutrons and 6 electrons b. The most stable ion of chlorine with a mass number of 37. 17protons, 20 neutrons and 18 electrons (1 more added to make a negative one charge) 4. Label the metal and nonmetals in the following collections of atoms: (5pts) a. Nitrogen nonmetal b. Argon nonmetal c. Lithium metal d. Iron metal e. Zinc metal
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Chapter 123 - EXAM I CHM 151IN (morning) NAME: _key_ 1....

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