Biology: Life on Earth
10th Edition
ISBN: 9780321729712
Author: Gerald Audesirk, Teresa Audesirk, Bruce E. Byers
Publisher: Benjamin Cummings
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Chapter 2, Problem 3RQ
Define isotopes and describe the properties of radioactive isotopes. LO3
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Chapter 2 Solutions
Biology: Life on Earth
Ch. 2 - Fill-in-the-Blank An atom consists of an atomic...Ch. 2 - Fill-in-the-Blank An atom that has lost or gained...Ch. 2 - Fill-in-the-Blank Atoms of the same element that...Ch. 2 - An atom with an outermost electron shell that is...Ch. 2 - Water is described as _____ because each water...Ch. 2 - Based on Table 2–1 how many neutrons are there in...Ch. 2 - Distinguish between atoms and molecules; between...Ch. 2 - Define isotopes and describe the properties of...Ch. 2 - 3. Compare and contrast covalent bonds and ionic...Ch. 2 - 4. Explain how polar covalent bonds allow hydrogen...
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- Explain why cadmium and mercury are toxic to most organisms.arrow_forwardMany radioactive isotopes are used in medicine for imaging and treatment purposes. The specific isotopes used depends on the particular organ or body system being studied (for example, Xe-133 is used to image lung function and blood flow.) Technetium-99m is a common radioactive isotope using for a variety of medical applications. It is produced from the decay of Molybdenum-99 and has a half-life of 6.01 hours. What are some of the applications of Tc-99m? While harder to access, another radioactive isotope of technetium, Tc-93, has a half-life of 2.73 hours. If it were easier to harvest, would this be a good substitute for Tc-99m? (remember to explain why for full credit) While Tc-99m has a half-life of 6.01 hours, its decay product has a half-life of 213,000 years. While the medical community considers it to be reasonably safe, within the limits of testing, does this make sense considering both chemical and biological principles? What are possible ways that you might deal with or…arrow_forwardWhat is the importance of knowing the isotopes?arrow_forward
- Carbon-14 is a radioactive material. It contains 6 protons and 8 neutrons. During the process of Carbon-14 decay, one of its 8 neutrons becomes a proton and an electron is formed in the process. Based on this information, select all that apply. The mass number is unchanged by the decay of Carbon-14. The mass number is changed by the decay of Carbon-14. After decay the atom is still Carbon. After decay the atom is not Carbon.arrow_forwardA nitrogen isotope with an atomic mass of 15, and an atomic number of 7, must have: 7 neutrons and 8 electrons 8 neutrons and 7 protons 7 electrons and 8 protons 8 protons and 7 neutrons 7 protons and 8 electronsarrow_forwardD) Isotopes of molybdenum have different numbers of electrons. moib 3 18) Carbon-14 has the same A) atomic number and atomic mass as carbon-12 B) atomic number and thus number of neutrons as carbon-13 C) atomic mass as both carbon-12 and carbon-13 D) number of protons but more neutrons than carbon-12 1m gaivil lo 2insmolo insbnuds kom oni si muiaio bon yvxo.obl.cod1oA 19) A(n). charge. A) proton; neutron B) neutron; proton C) neutron; electron D) electron; neutron has charge but negligible mass, whereas a(n) sm has mass but no .boolsse omuanou ion bluode olog mon gunsue ositegA(C Sabauoqm n gaiwollol si lo loidW ( O Lin OcH ( 20) The atomic number of nitrogen is 7. Nitrogen-15 has a greater mass number than nitrogen-14 because the atomic nucleus of nitrogen-15 contains on Jud A) 7 neutrons B) 8 neutrons C) 8 protons D) 15 protons isloun tisi ni anortuon bogudor tA attoTuon brus 2ol0g lo 19dnuun isupo ns (8 eao1o9ls bas enolong to 1odamun hanps n 21) Which of the following is not a…arrow_forward
- Atomic absorption spectroscopy is usually more sensitive than atomic emission spectroscopy because the population of the low-energy states isA) highB) lowC) zeroD) same as for high-energy statesarrow_forwardPolonium is a rare element with 33 radioisotopes. The most common one, 210Po, has 82 protons and 128 neutrons. When 210Po decays, it emits an alpha particle, which is a helium nucleus (2 protons and 2 neutrons). 210Po decay is tricky to detect because alpha particles do not carry very much energy compared to other forms of radiation. For example, they can be stopped by a single sheet of paper or a few inches of air. That is one reason that authorities failed to discover toxic amounts of 210Po in the body of former KGB agent Alexander Litvinenko until after he died suddenly and mysteriously in 2006. What element does an atom of 210Po become after it emits an alpha particle?arrow_forwardPolonium is a rare element with 33 radioisotopes. The most common one, 210Po, has 82 protons and 128 neutrons. When 210Po decays, it emits an alpha particle, which is a helium nucleus (2 protons and 2 neutrons). 210Po decay is tricky to detect because alpha particles do not carry very much energy compared to other forms of radiation. They can be stopped by, for example, a sheet of paper or a few inches of air. This property is one reason why authorities failed to discover toxic amounts of 210Po in the body of former KGB agent Alexander Litvinenko until after he died suddenly and mysteriously in 2006. What element does an atom of 210Po decay into after it emits an alpha particle?arrow_forward
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