9. The half-life of the radioactive element plutonium-239 is 25,000 years. If 16 grams of plutonium-239 are initially present, h
9. The half-life of the radioactive element plutonium-239 is 25,000 years. If 16 grams of plutonium-239 are initially present, how many grams are present after: (round your answer to the nearest hundredth) Find the exponential model first. a. 25,000 years b. 50,000 years c. 75,000 years d. 100,000 years e. 125,000 years
One important application of radioactivity is the determination of the age of archaeological or geological samples. If an object contains radioactive nuclei when it is formed, then the decay of these nuclei marks the passage of time like a clock, half of the nuclei disintegrating during each half-life. If the half-life is known, a measurement of the number of 140 nuclei present today relative to the number present initially can give the age of the sample. The radiocarbon technique utilizes the 6 isotope of carbon, which undergoes B decay with a half-life of 2 x 10" sec. This isotope is present in the earth's atmosphere at an equilibrium concentration of about one atom for every 7 x 1011 atoms of normal carbon 6 120 It is often assumed that this value has remained constant over the years because 6 c is created when cosmic rays interact with the earth's upper atmosp. ere, a production method that offsets the loss via B-decay. Moreover, nearly all living organisms ingest the equilibrium concentration of 6 14 C However, once an organism des 140 metabolism no longer sustains the input of 6 and ß decay causes half of the 6 nuclei to disintegrate every 2 x 1011 sec. Take In 2 = 0.7 14C Find the activity of sample of blood of a living organism sample in Bq/gm of carbon atoms present in the sample.
Ball Pool - Play it... Parking Fury 2 - Pla. my Launch Meeting -Z... E Bell Ringer: Evaluati. A Sign In My Activities Tell me what you want to do a The Law of Conservation of Matter and Energy-Unit Test The Law of Conservation of Matter and Energy-Unit Test Question 5 Points 1 Smoke detector is a(n) application of radioisotopes. O agricultural O medical consumer product archaeological Complete Later Complete « Previous 00:00 00:00 Grade Results, Inc: o 2005-2021 All Rights Reserved