All the very heavy atoms found in the earth were created long ago by nuclear fusion reactions
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All the very heavy atoms found in the earth were created long ago by nuclear fusion reactions in a supernova, an exploding star. The debris spewed out by the supernova later coalesced into the gases from which the sun and the planets of our solar system were formed. Nuclear physics suggests that the uranium isotopes 235U and 238U should have been created in roughly equal numbers. Today, 99.28% of uranium is 238U and only 0.72% is 235U. How long ago did the supernova occur?
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Related Book For
Physics For Scientists And Engineers A Strategic Approach With Modern Physics
ISBN: 9780321740908
3rd Edition
Authors: Randall D. Knight
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