The atomic mass of copper is 63.55 amu.There are onlytwo isotopes of copper,63Cu with a mass of 62.93 amu and65Cu with a mass of 64.93 amu.What is the percentageabundance of each of these two isotopes?

how to coculate the atomic mass of an element如何计算原子质量 英语翻译Mendeleev arranged the known elements in order of increasing atomic weight （molar mass）请问这句话后面的increasing atomic The atomic mass of copper is 63.55 amu.There are onlytwo isotopes of copper,63Cu with a mass of 62.93 amu and65Cu with a mass of 64.93 amu.What is the percentageabundance of each of these two isotopes? why is this the relative atomic mass of chlorine not a whole numberplease answer it in english The relative atomic mass scale makes it possible to know how many atoms of an element are element接上面 are present in a sample of the element with a measurable mass.这句话的句子成分怎么划分啊? CHEMISTRY-RELATIVE ATOMIC MASSthe mass of a hydrogen atom 1/1H is equal to 1/12 of the mass of a carbon-12 atom,so its relative isotopic mass is 1.A magnesium atom 24/12Mg is twice as heavy as a carbon-12 atom,so its relative isotopic mass is 24再 翻译the masses are all in atomic mass units（物理的） atomic mass跟atomic number的詳細介紹 考試用 200分求一道物理题 懂英文的神人 If sodium (Na),with an atomic weight of 23,combines with oxygen (O),with an atomic weight of 16,to from the compound Na2O,what is the ratio of the mass of sodium to oxygen that you would expect to react com the mass of 与 a mass of 有啥区别? the gram-equivalent mass of alcl3 is its gram-formula mass divided bya.1b.3c.4d.6 翻译：A neutron is a nuclear particle with an atomic mass of 2.0 and a neutral electrical charge. 200分求一道物理题,求懂英文的高手来帮下忙A certain isotope has 80 protons and 122 neutrons in its nucleus.Identify the element involved and find the atomic and mass numbers.Atomic number=Mass number= The club women gathered____clothes for people in the tsunami-hit countriesA a mass of B mass of C a large amount of D amount of 为什么选A The atomic number of an element X is 15.The number of electrons in an anion of X is?但是eleltrons不是等同atomic number吗?A 10B 12C 15D 18 mass的用法the mass of 和 a mass of 有什么区别？ 求助：the absorption of a multiple atomic beam 怎么翻译? Write the quantum numbers of 3p atomic orbitals