Definite identification has been made of an isotope of the element with atomic number 98 through the irradiation ofCm242with about 35-Mev helium ions in the Berkeley Crocker Laboratory 60-inch cyclotron. The isotope which has been identified has an observed half-life of about 45 min. and is ...
californium - a radioactive transuranic element; discovered by bombarding curium with alpha particles atomic number 98, Cf metal, metallic element - any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc. Based on WordNet ...
an element is a substance , all of ___ atoms have the same atomic number为什么选whose ? 请高手讲讲..相关知识点: 试题来源: 解析 首先句子后面是作定语的,由主句可以知道,修饰的是主语element.因为atoms是原子的意思,对于元素来说,逻辑关系自然是“元素里的原子”,所以element和atoms具有从属关系,用whose...
Oganessian YT et al (2010) Synthesis of a new element with atomic number Z=117. Phys Rev Lett 104(14):142502.https://doi.org/10.1103/PhysRevLett.104.142502 ArticleCASPubMedGoogle Scholar Orton JW (2009) Semiconductors and the information revolution: magic crystals that made IT happen. Academ...
解析 首先句子后面是作定语的,由主句可以知道,修饰的是主语element.因为atoms是原子的意思,对于元素来说,逻辑关系自然是“元素里的原子”,所以element和atoms具有从属关系,用whose(注意啦!在定语从句表示从属关系的时候,关系词whose不仅仅适用于人,也可以适用于物) ...
2 This question is about hydrogen, the element with atomic number Z =1.(a)(i) Hydrogen has two stable isotopes, H and H. Complete the table to show the number of subatomic particles present in the nuclei of these two isotopes of hydrogen.(1)Isotope Number of protons Number of neutrons...
The element with an atomic number 26 is AA non-metal BKrypton CIron DManganeseSubmit In known elements, the maximum number is of AMetals BNon-metals CMetalloids DGasesSubmit In known elements, the maximum number is of- Ametals Bnon-metals Cmetalloids Dnone of aboveSubmit ...
The chemical element with atomic number 20 is calcium. What is the abbreviation for c
Answer to: An element with an atomic number of 35 has an isotope with a mass number of 79. Write the symbol of this isotope. By signing up, you'll...
The chemical element with atomic number 11 is sodium. What is the abbreviation for so