Respuesta :
Analysis of radioactive isotopes in rocks this technique is used to determine when the earth first formed.
Radiometric relationship, which relies on the predictable decay of radioactive isotopes of carbon, uranium, potassium, and different factors, provides accurate age estimates for activities returned to the formation of Earth more than 4.5 billion years in the past.
Uranium is a silvery-white metallic chemical detail within the periodic desk, with atomic number ninety two. it is assigned the chemical image U. A uranium atom has 92 protons and 92 electrons, of which 6 are valence electrons. Uranium has the very best atomic weight of all naturally happening factors.
Carbon (from Latin carbo 'coal') is a chemical detail with the symbol C and atomic variety 6. it's miles nonmetallic and tetravalent—its atom making 4 electrons to be had to form covalent chemical bonds. It belongs to organization 14 of the periodic table. Carbon makes up simplest about 0.0.5 percent of Earth's crust.
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