1CHEMISTRY-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再给另一个例子不要用英文角度...
The atomic mass is the mass of the atom. It is composed of protons and neutrons. The unit is expressed in dalton. The atomic mass can be found on the periodic table. It is usually the number on the top left on the element symbol. ...
1The 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? 2【题目】T he atomic mass of copper is 63.55 amu.T here are onlytwo isotopes...
Which symbol replaces the unit of atomic mass, amu ? View Solution Assertion: S.I. unit of atomic mass and molecular mass is kilograms. Reason : Atomic mass is equal to the mass of 6.023×1024 atoms. View Solution Avogardo's number is the number of atomic mass units in one Vie...
The correct answer is (B) amu. Atomic mass is the mass of a single atom of an element or a single molecule of a substance. This mass is much too small...Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question Our experts can answer...
The mass number of argon is 40.How many protons, neutrons and electrons are there in an argon atom? ( ) 相关知识点: 试题来源: 解析 一个氩原子有 18 个质子、22 个中子和 18 个电子。 1. 原子序数: 氩的原子序数为 18,这意味着它的原子核中有 18 个质子。 2. 质量数: 氩的质量数为 40...
Mass Number It is the sum of neutrons and protons of an atom present in nucleus. Mass Number for two different atoms can be same. The Atomic Mass of an atom is approximately equal to its Mass Number as mass of a neutron as well of a proton is one unit on atomic mass scale. Post ...
试题来源: 解析 A 选项A中的质子和中子位于原子核内,构成了原子的主要质量,而电子的质量极小,可忽略不计。原子质量数即质子数与中子数之和。选项B和C错误地包含了电子,而选项D虽然所有粒子都包含,但电子贡献微乎其微,因此正确答案为A。反馈 收藏
AMU Atomic mass unit, defined so that the mass of the commonest carbon isotope is 12 amu, making the mass of the hydrogen atom approximately equal to 1 amu.Borysow, A., and L. Frommhold, "Theoretical collision-induced roto-translational absorption spectrafor modelling Titan's atmosphere ...
1 amu ( atomic mass unit ) mass is equal to energy of 03:26 To measure the resistance of a galvanometer by half deflection method,... 01:25 Cadmium and Broron rods are used in a nuclear reactor to 00:52 Calculate the number of photons emitted per second by a 10 watt sodium... ...