"The half-life a carbon 14 is 5600 yrs. How old is a fossil that contains 25% of the normal proportion of carbon 12 to carbon 14" please explain how you solve for this
2007-04-30 15:49:24 · 2 answers · asked by jbljackie 2 in Science & Mathematics ➔ Chemistry
2 half lives have elapsed.
Thus age = 2*5600 yrs = 11200 yrs.
2007-04-30 21:09:37 · answer #1 · answered by ag_iitkgp 7 · 0⤊ 0⤋
Scientists artwork out the style of atoms interior the parent isotope, style of atoms interior the daughter isotope and use the generic a million/2-existence of the isotope to be certain how lots decay has occured and consequently the time it has taken to ensue. parent Isotope good Daughter Product presently accepted a million/2-existence Values Uranium-238 Lead-206 4.5 billion years Uranium-235 Lead-207 704 million years Thorium-232 Lead-208 14.0 billion years Rubidium-87 Strontium-87 40 8.8 billion years Potassium-40 Argon-40 a million.25 billion years Samarium-147 Neodymium-143 106 billion years
2016-12-28 05:52:07 · answer #2 · answered by natoli 3 · 0⤊ 0⤋