Therefore, if a sample has an activity of 1 Bq, it means that one radioactive decay occurs every second. 5. Summary: - To summarize, the activity of a radioactive substance is the number of decays per second, and it is measured in Becquerels (Bq), where 1 Bq = 1 decay/second. -...
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3.We found that pitchblende contains at least two radioactive materials, one of which, accompanying bismuth, has been given the name polonium, while the other, paired with barium, has been called radium. 3.我们发现沥青铀矿物中至少含有两种放射性物质:与铋伴生的命名为钋,与钡伴生的命名为镭。 用...
aIt can also contribute to the release of radioactive fission products to the environment 它可能对放射性核裂产物发行也贡献对环境[translate] aThis is my father.He"s a driver 这是我的父亲。他" s司机[translate] aA million thanks for psoting this information. 百万感谢psoting这信息。[translate...
() One of those particles, having about one thousandth the mass of a hydrogen atom, which are projected from the cathode of a vacuum tube as the cathode rays and from radioactive substances as the beta rays; -- called also corpuscle. The electron carries (or is) a natural unit of negat...
() One of those particles, having about one thousandth the mass of a hydrogen atom, which are projected from the cathode of a vacuum tube as the cathode rays and from radioactive substances as the beta rays; -- called also corpuscle. The electron carries (or is) a natural unit of negat...
athe article that can burn easily is radioactive article 正在翻译,请等待... [translate] aΣεαγαπω 正在翻译,请等待... [translate] a这种全新的学习方式,实现了大众化,个性化,学习可以完全由自己来决定。 This brand-new study way, realized the popularity, the personalization, the study has ...
ALL twenty of astatine's isotopes are radioactive. That means they break down spontaneously and are transformed into other elements. Isotopes are two or more forms of an element. Isotopes differ from each other according to their mass number. The number written to the right of the element's ...
athis usually involves the use of a radioactive source within the mould wall to measure the absorption of gamma rays due to the presence of liquidsteel. 正在翻译,请等待...[translate] aParents should try not to let the baby again and caught a cold which greatly reduce your baby's resistan...
protons plus neutrons in the nucleus of an atom of the element. The number of protons determines the element, but the number of neutrons in the atom of any one element can vary. Each variation is an isotope. A radioactive isotope is one that breaks apart and gives off some form of ...