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9) The . A) Aristotle B) Plato C) Ptolemy D) Democritus 10) As of April 2022, this is considered the smallest bit of matter. C) Quark D) Weebit 11) During a PET scan, a patient is injected with a Fluorine 18 isotope. This isotope undergoes positive Beta decay into what isotope? A) Molecule B) Atom A) Fluorine 17 B) Oxygen 18 C) Neon 17 D) Neon 18 12) Uranium 238 undergoes Alpha decay. What's the resulting isotope? A) Thorium 236 B) Thorium 234 C) Radium 236 D) Radium 234 13) Which of the following radioactive decays would not change an isotope's atomic number? A) Alpha B) Beta C) Gamma D) None of these 14) What's the mystery element in the following reaction? Pu + on → Sr + x +2 in 90 38 A) Ba147 B) Lal 47 C) Bal 45 D) Cs145 15) The Sun radiates approximately 4.0 x 1026Joules of energy each second. This energy is produced by nuclear reactions in its core of course, so approximately how much mass is converted to energy each second? A) 2.33 x 10°kg B) 4.44 x 10°kg C) 15,250kg D) 1.33 x 10'8kg