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Polonium is a rare element with 33 radioisotopes. The most common one,
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BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
- Polonium 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_forwardAn isotope of sodium (Na) has a mass number of 22. How many neutrons does it have? a. 11 b. 12 c. 22 d. 44arrow_forwardFigure 2.3 How many neutrons do (K) potassium-39 and potassium-40 have, respectively?arrow_forward
- Figure 2.3 How many neutrons do carbon-12 and carbon-13 have, respectively?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_forwardMagnesium has an atomic number of 12. Which of the following statements is true of a neutral magnesium atom? a. It has 12 protons, 12 electrons, and 12 neutrons. b. It has 12 protons, 12 electrons, and six neutrons. c. It has six protons, six electrons, and no neutrons. d. It has six protons, six electrons, and six neutrons.arrow_forward
- a 139 ng sample of radioactive material has a half life of 4.2 days how many ng of radioactive material is left after 3 half lives ?arrow_forwardThe atomic mass number of an atom is determined by the sum of the number of in the atom. (a) protons plus electrons plus neutrons (b) protons plus electrons (c) neutrons plus electrons (d) neutrons plus protonsarrow_forwardA 10.00 mg sample of technetium-93 (92.91024898 u) is used to heat 125.4 g of water from 23.4 degree C to 87.4 degree C. How many minutes will be required to heat the water if all of the energy generated from the decay is used to heat the water?arrow_forward
- Write the nuclear equation for the positron decay of C-11.arrow_forwarda certain element consists of two stable isotopes. the first has a mass of 138 amuarrow_forwardFor Be-10, find the: a.) mase defect (in grams) b.) binding energy in kilojoules per mole. mass proton= 1.00728 amu; mass neutron= 1.00867 amu; mass Be-10 = 10.013534679 amuarrow_forward
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