1 The relative atomic mass of an element is always D A the mass of an atom of the element relative to z the mass of a carbon-12 atom. B the mass of an atom of the element relative to the mass of a hydrogen atom.□ C the weighted mean mass of an atom of the element relative ...
题目 The relative atomic mass of chlorine is 35.5.When calculating relative atomic mass, which particle is the mass of a chlorine atom compared to? A.a neutronB.a protonC.an atom of carbon-12D.an atom of hydrogen-1 相关知识点: 试题来源: 解析 C 反馈 收藏 ...
解析 We don't round it to a whole number because we want the number of the relative atomic mass of cholorine to be as precise as possible.We really care about the significant figures,so it's better if we get more digits. 结果一 题目 why is this the relative atomic mass of chlorine ...
relative atomic mass - (chemistry) the mass of an atom of a chemical element expressed in atomic mass units atomic mass, atomic weight mass - the property of a body that causes it to have weight in a gravitational field combining weight, eq, equivalent weight, equivalent - the atomic weight...
3.The relative molecular mass of a metal sulphate, XSO4 is 136.What is the relative atomic mass of metal X? C[Relative atomic mass: O, 16; S, 32]Jisim molekul relatif bagi satu logam sulfat, XSO4 ialah 136.Berapakah jisim atom relatif bagi logam X?[Jisim atom relatif: O, 16; ...
3 CHEMISTRY-RELATIVE ATOMIC MASS the 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...
Keywordschemicalelement化学元素relativeatomicmass相对原子质量atomicweight原子量invariant不变量radioactiveelement放射性元素isotope同位素half-time半衰期uncertainty未确定值source来源IUPAC（InternationalUnionofPureandAppliedChemistry）国际纯粹与应用化学委员会缩写词 CommissiononAtomicWeightsandIsotopicAbundances原子量与同位素丰度...
(redirected from relative atomic masses)Also found in: Dictionary, Thesaurus. relative atomic mass the ratio of the average mass per atom of the naturally occurring form of an element to one-twelfth the mass of an atom of carbon-12. Collins Discovery Encyclopedia, 1st edition © Harper...
aThe masses of atoms and molecules are characterized by using quantities known as the relative atomic mass of an element (the atomic mass in short) and the relative molecular mass of a substance (the molecular mass ) 原子和分子大量描绘的是为使用数量以元素(原子质量的原子量简而言之)和物质的...
This chapter focuses on relative atomic masses, molecular masses, and the "mole" concept. When the laws of chemical combination were formulated, it was necessary to decide on an arbitrary value for the mass of one element so that comparative reacting masses could be made. As hydrogen gas was...