Multiple ChoiceWhat is TRUE about carbon-13 and carbon-14?a) They are isotopes.b) They have the same mass number.c) They have the same number of neutrons in their nuclei.d) They behave differently in biological reactions.e) None of the above are true.3189views33rank
Multiple ChoiceHow are Carbon-13 and Nitrogen-15 respectively different from the more abundant isotopes Carbon-12 and Nitrogen-14? Carbon-13 and Nitrogen-15 _______________:a) Each have an extra neutron. b) Each have an extra proton. c) Each have one less neutron.d) Each have one less proton. e) Each have one less electron. 2705views30rank
Multiple ChoiceThe atomic number of nitrogen is 7. Nitrogen-15 has a greater mass number than nitrogen-14 because the atomic nucleus of nitrogen-15 contains ________.a) 7 neutrons.b) 8 neutrons.c) 8 protons.d) 15 protons.4783views40rank
Multiple ChoiceRadioactive isotopes are utilized for all of the following except:a) Dating fossilized material of once living things.b) Radiation treatment to slow or stop the development of cancer cells.c) Labeling regions of the body with radioactivity for special imaging techniques.d) All of the above.3113views11rank2comments
Multiple ChoiceThe isotope Carbon-14 has a half-life of 5,730 years. How many years must pass for a sample of Carbon-14 to break down to ¼ of its original amount?a) 5,730 years b) 17,190c) 11,460d) 2,8653493views81rank5comments
Multiple ChoiceA particular carbon isotope has an atomic number of 6 and an atomic mass of 14. The respective numbers of neutrons, protons, and electrons that this carbon isotope has are __________. 1085views
Multiple ChoiceThe most common form of calcium has 20 protons, 20 neutrons, and 20 electrons. Which of the following elements would be an isotope of calcium? 5967views
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