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Sagot :
There are four isotopes that have been found to be capable of producing heat: 238U, 235U, 232Th, and 40K. In comparison to 238U, the isotope 235U has a shorter half-life and produces more energy during decay. This makes 238U an ideal isotope for producing radiogenic heat.
The heat energy that spontaneous nuclear disintegrations release. Although uranium, thorium, and potassium are the main isotopes in the Earth today, other short-lived isotopes may have played a role in the early stages of the planet's development.
Some substances, referred to as radioactive substances, such as potassium, uranium, and thorium, decompose and release energy through a process called radioactive decay. This ongoing radioactive decay in the Earth's crust and mantle contributes heat and delays the planet's cooling.
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