What is polonium-210 and how can it kill?JILL LAWLESS
Polonium is an extremely unstableradioactivechemical element which forms as part of the decay process ofradium, another radioactive element. Because polonium is a stage in radium's decay process, it is sometimes called radium F. This element appears in trace amounts in nature, typically inuranium...
Improvements in transportation C. New methods of agriculture D. Changes in fashion industry 相关知识点: 试题来源: 解析 A。本题考查玛丽·居里发现镭和钋的影响。她的发现主要导致了癌症治疗方面的进步,选项 B“交通方面的改进”、选项 C“农业的新方法”和选项 D“时尚产业的变化”均与她的发现无关。
Several naturally occurring metals such as francium, polonium, and astatine are also radioactive and ultra-rare. You’ll frequently read that the total astatine supply in the earth’s crust at any given moment is about an ounce. As products of radioactive decay, astatine and the like are too...
and tasteless gas. It’s found in almost all soil and is produced by a natural process as uranium breaks down into radium and then into radon gas. Radon in turn breaks down into solid radioactive elements known as “radon progeny” (such as polonium – 218) that attach to airborne partic...
Beta decay is a nuclear process in which an unstable nucleus emits a beta particle, which can be an electron or a positron, and transforms into a different nucleus. This process occurs when there is a mismatch between protons and neutrons in the ...
Decay chain of uranium-238, with radon near the middle That’s what the progeny (decay products) of radon do. They’re electrically charged, so they stick to the alveoli in the lungs. The decay products polonium-218 and polonium-214 are believed to cause most of the lung cancer from hou...
What are they if the polonium emits an alpha particle? When radium 226 decays emitting an alpha particle, what is the atomic number and atomic mass of the resulting nuclei? If a sample of a radioactive isotope has a half-life of 3 years, how much of the o When a ^{226}_{88...
钋是被发现的第一个放射性元素。 钋元素及其化合物是高度放射性。 它与合金铍中子提供源。 3.2 来源 矿业, 金属矿藏 3.3 历史 3.3.1 谁发现了 皮埃尔·居里和玛丽·居里 3.3.2 发现 1898年 3.4 丰富 3.4.1 丰宇宙 不可用 铊金属▶⊕ 5E-090.11 ...