A 10 g sample of a radioactive element took 12 days to reduce into 1 g. Calculate the half-life and identify the element.
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- Some configurations of protons and neutrons inside a nucleus are unstable. When an atomic nucleus is unstable they become stable by removing a proton or neutron through radiations. This process is called radioactive decay.
- This decay will be exponential in nature and is given by,
Here N0 is the original number of radioactive nuclei present, t is the time, and t1/2 is the half-life of the radioactive sample. This is known as the exponential law of radioactive decay.
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- Determine the nucleus density (in kg/m3) of the following four isotopes.4He (m = 4.00260325415 u) = 2.307e17 kg/m^321Ne (m = 20.99384668 u) = ______ (CANNOT BE 2.99328e17 kg/m^3)186Tl (m = 185.97833 u) = ________ (CANNOT BE 2.9946e13 kg/m^3)231Pa (m = 231.035884 u)= _____ (CANNOT BE 3.624e-13 kg/m^3)A wood artifact discovered in 1990 showed a 14C-activity equivalent to 43% of that found in the living tree. The half-life of carbon-14 is 5730 years. How old was the artifact at the time the discovery was made? Answer: 7.0 x 103 yrs I am having a hard time reaching this answer. Can you please show me your calculations to getting this answer? Thank you.After 2.14 days, the activity of a sample of an unknown type radioactive material has decreased to 82.2% of the initial activity. What is the half-life of this material? days Need Help? Read It