unified atomic mass unit【化】 统一的原子质量单位 relative mass excess相对质量过剩 relative molecular massn. 〈化〉分子量 相似单词 atomica. 1.原子的,原子武器的 2.核的,核能的 relativeadj. 1.相比较而言的;比较的 2.相对的;相关联的 3.相比之下存在(或有)的 4.关于(或涉及到)……的 5.指代前...
相對原子質量(RelativeAtomic Mass)p.28 •氫原子的真正重量= •氫原子的真正重量=1.67x10 -24 g •碳原子的真正質量= •碳原子的真正質量=1.99x10 -23 g 結論 •用普通重量單位去量度原子的重量是非 常不方便。 解決方法 •在一九六一年決定以碳-12( 12 6 C)12 a.m.u.(atomicmassunit)原子質...
The reciprocal of the density is the specific volume v, while the product of v and the relative atomic mass W is known as the atomic volumeΩ. The density may be determined by the usual ‘immersion’ method, but X-ray measurement of the unit cell size can also provide a value. Worked...
(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...
Atomic Mass- Atomic mass is the mass of an atom or other particle, expressed in unified atomic mass units (u). An atomic mass unit is defined as 1/12th the mass of a carbon-12 atom. Since the mass of electrons is much smaller than that of protons and neutrons, the atomic mass is ...
Relative atomic mass is a dimensionless physical quantity, the ratio of the average mass of atoms of an element (from a single given sample or source) to12of the mass of an atom of carbon-12 (known as the unified atomic mass unit). ...
Step-by-Step Solution:1. Definition of Atomic Mass: Atomic mass refers to the mass of a single atom of an element. It is typically measured in atomic mass units (amu).2. Challenges with Direct Me
it's because an atom of carbon-12 has 12 nucleons, 6 protons plus 6 neutrons (and 6 electrons). So the atomic mass unit is the mass of one nucleon. Some luck helped here, as the mass of a neutron resembles the mass of a proton plus an electron. So in a neutral atom, protons+...
Relative atomic mass is a dimensionless physical quantity, the ratio of the average mass of atoms of an element (from a single given sample or source) to12of the mass of an atom of carbon-12 (known as the unified atomic mass unit). ...
relative molecular mass- (chemistry) the sum of the relative atomic masses of the constituent atoms of a molecule molecular weight mass- the property of a body that causes it to have weight in a gravitational field chemical science,chemistry- the science of matter; the branch of the natural ...