Biology
Biology, 21.08.2019 23:00, maddiemalmstrom

What is the half-life of an element

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Mathematics, 21.06.2019 12:30, haily13
Element x decays radioactively with a half life of 8 minutes. if there are 450 grams of element x, how long, to the nearest tenth of a minute, would it take the element to decay to 37 grams?
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Biology, 27.06.2019 16:30, keke6361
Ascientist is studying a radioactive element that has a half-life of 63 years. choose the correct answers from the drop-down menus to complete each statement about the element. it will take years for half of the sample to decay. in 189 years, of the sample will be left. scientists can figure out how old a sample is by multiplying the by the length of the half-life.
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Geography, 11.09.2019 23:10, raikespeare5080
What have you learned about radioactive dating? check all that apply. unstable atoms release particles. the radioactive decay of an element occurs at a constant rate. a half-life is half of the lifetime of a radioactive element. at one half-life, half of the original unstable element has decayed. all elements are radioactive.
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Mathematics, 10.11.2019 07:31, annikafischer
35.7 half-lives of radioactive elements radioactive element element's half-life (billion years) element it decays into lutetium-176 halfnium-176 potassium-40 11.93 argon-40 rhenium-187 423 osmium-187 rubidium-87 48.8 strontium-87 thorium-232 lead-208 uranium-238 lead-206 graph it on a separate sheet of paper, draw a bar graph showing the half-lives of the radioactive elements in the chart. be sure to label your graph's x- and y-axes, and give your graph a title analyze it 1. which element has the longest half-life? the shortest? 4. can radiocarbon dating be used to date most rocks? explain why or why not. 2. which radioactive element is the source for lead-208? 5. suppose scientists used radioactive dating to determine that rocks at a dig site were 3 million years old. what would this data suggest about the age of any fossils found at the site? explain your answer. 3. how many elements in the chart have a half-life of less han 15 billion years?
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