Chapter - 2-3 Skill Builders.docx

Chapter - 2-3 Skill Builders.docx - SKILL Building...

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SKILL Building Exercises Chapters 2 & 3 1. The diameter of a chlorine atom is 200 pm. What is that value in angstroms? 2.0 Å 2. If a neutral atom has 15 protons, how many electrons should it have? 15 electrons a. What element is it? 3. The diameter of a U.S. dime is 17.9 mm and the diameter of a silver atom is 2.88 Å. How many silver atoms can be arranged side-by-side across the diameter of a dime? 6.22 x 10 7 Ag atoms (62.7 million Ag atoms) 4. What determines the size of an atom? 5. The diameter of a carbon atom is 1.54 Å. a. Express this diameter is picometers. b. How many carbon atoms can be aligned side-by-side across the width of pencil that is 0.20 mm wide? 6. Identify the element that has these atomic numbers. a. 10 b. 20 c. 16 d. 6 e. 35 7. How many protons, neutrons and electrons are in an atom of a)
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