2 · en
Short, simple sentences with “isotopes”, suitable for children and primary/elementary school, with common expressions and related words. You'll also find examples for middle and high school.
The future is coming with major developments: the production and combustion of hydrogen (the only clean fuel), and the elusive fusion of hydrogen isotopes to obtain helium.
The isotopes found in nature are mostly stable, but a few dozen are radioactive or radioisotopes, i.e. they spontaneously disintegrate with the emission of alpha, beta and gamma radiation.
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