What are the mass percents of C and F in Teflon
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What are the mass percents of C and F in Teflon
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- https://www.walter-fendt.de/html5/phen/decaychains_en.htm 1) Thorium series. Click on “next decay” to follow the decay chain of Thorium.a. Write down the full decay chain.b. How many alpha decays and how many beta decays are involved?2) Neptunium series. Click on “next decay” to follow the decay chain of Neptunium. What is the enddaughter nucleus for this decay chain?Don't use : Ug= mgh please.What is the half life of Technetium?
- An air bubble frozen in ice is extracted from many meters below the surface in the arctic. The sample of air is found to have an activity per gram of carbon that 0.8% that of air today. About how long ago was this pocket of air frozen? 35,000 years ago 40,000 years ago 46,000 years ago 52,000 years ago 58,000 years agoA picture supposedly painted by Vermeer (1632-1675) contains 99.5% of its carbon-14 (half-life of 5730 years). 1. Is this enough information to determine if the picture is a fake? 2. What is the strategy for attacking the problem?A radioactive sample was measured 41.7 years ago. It had an activity of 2943.8 Bq. Today, its activity is 72.9 Bq. What is the half-life (in years) of this substance?
- A skull fragment from an archeological dig is found to have an activity per gram of carbon that is about 6.3 % of what is found in currently living people. If the half-life of C-14 is 5730 years about how long ago was this person alive? a) 18,000 years ago b) 23,000 years ago c) 29,000 years ago d) 34,000 years ago e) 40,000 years agoA radioactive sample was measured 9.1 years ago. It had an activity of 9783.8 Bq. Today, its activity is 21 Bq. What is the half-life (in years) of this substance?What is the half-life of Ra-226?