Relative atomic mass (symbol: Ar; sometimes abbreviated RAM or r.a.m.), also known by the deprecated synonym atomic weight, is a dimensionless physical...

mass in atomic mass units" for Ar(e) involves a circular definition (at least in terms of practical measurements). The electron relative atomic mass also...

Atomic mass (ma or m) is the mass of a single atom. The atomic mass mostly comes from the combined mass of the protons and neutrons in the nucleus, with...

molar mass of a compound is given by the sum of the relative atomic mass Ar of the atoms which form the compound multiplied by the molar mass constant...

The mass number (symbol A, from the German word: Atomgewicht, "atomic weight"), also called atomic mass number or nucleon number, is the total number...

The dalton or unified atomic mass unit (symbols: Da or u, respectively) is a unit of mass defined as ⁠1/12⁠ of the mass of an unbound neutral atom of...

also known as the atomic mass constant. Among various variants of the notion of atomic weight (Ar, also known as relative atomic mass) used by scientists...

the nucleon mass, the atomic mass of any atom, when expressed in daltons (making a quantity called the "relative isotopic mass"), is within 1% of the...

compound is its relative atomic mass (atomic weight) or relative molecular mass (molecular weight or formula weight) multiplied by the molar mass constant....

element. The derived quantity relative molecular mass is the unitless ratio of the mass of a molecule to the atomic mass constant (which is equal to one...

universal atomic mass units (symbol: u). Its relative atomic mass is a dimensionless number equal to the atomic mass divided by the atomic mass constant...

Dalton had plagiarised his ideas, but Higgins' theory did not address relative atomic mass. Recent evidence suggests that Dalton's development of thought may...

definitions may be specified. The mass of a substance is equal to its relative atomic (or molecular) mass multiplied by the molar mass constant, which is almost...

Equivalent weight has the units of mass, unlike atomic weight, which is now used as a synonym for relative atomic mass and is dimensionless. Equivalent...

16 K by the definition of the kelvin at that time; Ar(Ar) is the relative atomic mass of argon and Mu = 10−3 kg⋅mol−1 as defined at the time. However,...

on a planet. The relative atomic mass (a weighted average, weighted by mole-fraction abundance figures) of these isotopes is the atomic weight listed for...

Properties of the Atomic Weights of the Elements, which described elements according to both atomic weight (now called relative atomic mass) and valence....

constant 6.022×1023 mol−1 (the number of atoms per mole) divided by the relative atomic mass of potassium (39.0983 g/mol), namely about 1.80×1018 per gram. As...

or pure elements) the number of protons in each nucleus Relative atomic mass, a.k.a. atomic weight: (applies to individual isotopes or specific mixtures...

In atomic physics and quantum chemistry, the Aufbau principle (/ˈaʊfbaʊ/, from German: Aufbauprinzip, lit. 'building-up principle'), also called the Aufbau...

on its origin, which determines its relative atomic mass in the source material. An accurate relative atomic mass for samples of lithium cannot be measured...

formulated the periodic law as a dependence of chemical properties on atomic mass. As not all elements were then known, there were gaps in his periodic...

chemistry Aspect ratio (aeronautics), of a wing Relative atomic mass (Ar), the ratio of the average mass of atoms of an element A US Navy hull classification...

that year. Mendeleev had predicted an atomic mass of 44 for eka-boron in 1871, while scandium has an atomic mass of 44.955907. In 1871, Mendeleev predicted...

Radar-absorbent material Rechargeable alkaline manganese battery Relative atomic mass Reliability, availability, and maintainability, in logistics Root...

potential (A) mass number of a nuclide (A) pre-exponential factor (A) one of the reciprocal lattice vectors (a*) relative atomic mass (Ar) Richardson's...

that allows simultaneous (1) preservation of the sequence of increasing atomic numbers, (2) a 14-element-wide f-block, and (3) avoidance of the split in...

stars, releasing light and heat and forming heavier elements with higher atomic numbers. Heavier elements are not usually formed this way since fusion reactions...

has a relative atomic mass of 27.9769265325(19). With this approach, the Avogadro constant would not only be fixed, but so too would the atomic mass of 28Si...

≫ 1 {\displaystyle Q^{*}\gg 1} . Relative density – density relative to water Relative atomic mass, Standard atomic weight Equilibrium constant (which...