例句與造句

1. When the age-dating researchers bombard potassium-40 with neutrons, they can create an artificial isotope of argon called argon-39.
2. Twenty-eight artificial isotopes of zirconium have been synthesized, ranging in atomic mass from 78 to 110 . positron emission.
3. The artificial isotope reactivity ( the number of neutrons per fission that go on to fission other atoms of nuclear fuel ).
4. The stablest artificial isotope is indium-111, with a half-life of approximately 2.8 days . All other isotopes have half-lives shorter than 5 hours.
5. Many elements have both natural and artificial isotopes ( e . g . hydrogen has three natural isotopes and another four known artificial isotopes ).
6. It's difficult to find artificial isotope in a sentence. 用artificial isotope造句挺難的
7. Many elements have both natural and artificial isotopes ( e . g . hydrogen has three natural isotopes and another four known artificial isotopes ).
8. The long-lived starting isotopes of these three isotopes, respectively thorium-232, uranium-238, and uranium-235, have existed since the formation of the earth, ignoring the artificial isotopes and their decays since the 1940s.