Q24,25 xplou how naturally occurring ratct towp inside Earth produce geothermal Ex energy 23. Uranium-235 has a much...
xplou how naturally occurring ratct towp inside Earth produce geothermal Ex energy 23. Uranium-235 has a much shorter half-life than uranium-238. These two isotopes occurred in equal abundance when Earth was formed. Compare their relative abundance today 4. A radioactive tracer used in a medical test has a half-life of, 2.4 h. What fraction of this tracer will remain after 12 h? 25. An archaeologist finds a wooden arrow shaft vith a proportion of carbon-14 that is about 25 percent of that in a living tree. Estimate the age of the arrow. Hint? Refer to Figure 8.16 on page 257. 26. Describe some sources of ionizing radiation in your daily life. Which exposures do you think are likely to affect your health in time? Justify your response. Reflection 27. There are strong similarities between alpha and beta decay. Describe how you would help a fellow student understand the differences between these decays. Fot example, would you draw a sketch of the nucleus? Would you work with reaction equations?
xplou how naturally occurring ratct towp inside Earth produce geothermal Ex energy 23. Uranium-235 has a much shorter half-life than uranium-238. These two isotopes occurred in equal abundance when Earth was formed. Compare their relative abundance today 4. A radioactive tracer used in a medical test has a half-life of, 2.4 h. What fraction of this tracer will remain after 12 h? 25. An archaeologist finds a wooden arrow shaft vith a proportion of carbon-14 that is about 25 percent of that in a living tree. Estimate the age of the arrow. Hint? Refer to Figure 8.16 on page 257. 26. Describe some sources of ionizing radiation in your daily life. Which exposures do you think are likely to affect your health in time? Justify your response. Reflection 27. There are strong similarities between alpha and beta decay. Describe how you would help a fellow student understand the differences between these decays. Fot example, would you draw a sketch of the nucleus? Would you work with reaction equations?