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Exam-1-SOL - EXAM 1 1 Daltons Atomic Theory states(1 pt...

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EXAM 1 1. Dalton’s Atomic Theory states (1 pt) that matter is composed of small indestructible particles. 2. Which one of the following scientists is credited with the discovery of the proton thus establishing a nuclear based view of the atom? (1 pt) Rutherford 3. Which one of the following would be an isotope with 12 C? (1 pt) 14 C 4. Which of the following is true for the atom 172 Au? (1 pt) number of protons= 79; number of neutrons= 93; number of electrons= 79 5. Elements in the periodic table are arranged based on which one of the following? (1 pt) Increasing atomic number 6. Suppose a fictitious element has the following isotopes each with the given natural abun- dance: X-54 with mass of 53.94 amu and natural abundance of 35.00% X-56 with mass of 55.93 amu and natural abundunce of 50.00% X-58 with mass of 57.93 amu and natural abundance of 15.00% Calculate the atomic mass of this element. (5 pts) 55.53 7. Calculate the number of atoms in a 2.50 gram pure gold (Au) nugget. (3 pts) 7.64 × 10 21 8. A sphere of pure silver (Ag) contains 7.04 × 10 23 atoms.
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