Radioactive dating math problems


08-Feb-2017 18:51

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The ratio of carbon-12 to carbon-14 at the moment of death is the same as every other living thing, but the carbon-14 decays and is not replaced.The carbon-14 decays with its half-life of 5,700 years, while the amount of carbon-12 remains constant in the sample. Chemistry A 53.8-mg sample of sodium perchlorate contains radioactive chlorine-36 (whose atomic mass is 36.0 amu). What can scientists learn from the rate at which radioactive elements decay? If the initial amount of gallium-70 is 25 milligrams, when will 10 milligrams be left?By the way, it is important to understand that most rock strata “dates” were actually assigned long before the first use of radioactive age estimating methods in 1911.

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(1 point) chem How long does it take for 10.0 g of a radioactive isotope to decay to 1.25 g if its half-life is 17.0 d? _____ is based on the idea that younger rock layers are deposited on top of older rock layers ... a) radioactive phosphorus in viral proteins was shown not to enter bacterial cells b) radioactive phosphorus in viral DNA was shown to enter bacterial cells **** (my choice) c) radioactive sulfur...

Learn about different types of radiometric dating, such as carbon dating.