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Transcript
Advanced Chemistry I Atomic Numbers Practice Problems Basic Problems 1. What is the mass number of an atom that has 11 protons and 13 neutrons? 2. Use the given information to fill in the blanks in the table below: Element Symbol # of p+ # of n0 # of eAtomic Number Oxygen Silicon Aluminum Iron O Si Al Fe 8 14 Calcium Copper Magnesium Ca Cu Mg 20 29 Gold Au 79 Silver Ag Mass Number 8 14 14 13 16 28 13 26 56 40 35 29 12 24 197 61 47 Atomic Symbols 3. Write the chemical symbol for atom Y, which has 27 protons and a mass number of 59. 4. Write the chemical symbol for atom X, which has 84 protons and 125 neutrons. 5. Write the chemical symbol for atom Z, which has 73 electrons and 108 neutrons. 6. Fill in the table below using the atomic symbol data given: Atomic Atomic Number of Symbol Number Mass Protons 12 6C 40 18Ar 127 53I 23 11Na 20 10Ne 48 22Ti 238 92U Number of Neutrons Number of Electrons Isotopes 7. With respect to the three fundamental particles of atoms, which numbers of particles are the same between two isotopes, and which ones are different? 8. Use one sentence to explain why some isotopes are radioactive, and some are not. Bonus: Which two of the following are isotopes of element X? 46 X 20 20 X 46 43 X 20 46 X 43