1) Who is the scientist that discover X-ray? a) Marie dan Pierre Curi b) Wilhelm Conrad Roentgen c) Ernest Rutherford d) Antoine Henri Becquerel 2) What is the discovery made by Marie and Pierre Currie in radioactivity? a) Discover X-ray b) Detect radioactive radiation c) Discover radioactivity d) Extracted two radioactive elements, polonium and radium from uranium ore 3) The first person who discovered gamma rays emitted by radium is: a) Marie dan Pierre Curi b) Wilhelm Conrad Roentgen c) Ernest Rutherford d) Antoine Henri Becquerel 4) Scientist X received the Nobel Prize in Physics in 1903 for the discovery of radioactivity. Who is X? a) Wilhelm Conrad Roentgen b) Marie dan Pierre Curi c) Ernest Rutherford d) Antoine Henri Becquerel 5) What new elements did Marie and Pierre Curie discover? a) Uranium and polonium b) Radium and uranium c) Radium and polonium d) Radium and thorium 6) Who discovered alpha ray that is emitted from the nucleus of uranium-238 ? a) Wilhelm Conrad Roentgen b) Antoine Henri Becquerel c) Ernest Rutherford d) Marie dan Pierre Curi 7) Radioactivity is the spontaneous random decay of unstable nuclei with the emission of alpha, beta or gamma radiation. a) True b) False

Chapter 8

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