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{{r|Unified atomic mass unit}}

...''relative molecular mass''') is the mass of a [[molecule]] expressed in [[unified atomic mass unit]]s. The molecular mass is equal to the sum of the [[atomic mass]]es of the

{{r|Unified atomic mass unit}}

{{r|Unified atomic mass unit}}

{{r|Unified atomic mass unit}}

{{r|Unified atomic mass unit}}

...er a pure substance B of entities with molecular mass ''M''(B) u ( u is [[unified atomic mass unit]]). [[Avogadro's number|Recalling]] that ...can be interpreted in two ways: (1) the average mass of a single atom in [[unified atomic mass unit]]s (u) or (2) the average mass of a mole of atoms in grams. For magnesium,

{{r|Unified atomic mass unit}}

{{r|Unified atomic mass unit}}

...ly known as '''atomic weight''') is the [[mass]] of an atom expressed in [[unified atomic mass unit]]s (u). Atomic mass is numerically equal to '''relative atomic mass''', den The ratio of the average mass of the atom to the unified atomic mass unit

...mass" often is taken instead to refer to the [[Unified atomic mass unit|''unified atomic mass unit'']], the ''Dalton'', symbol ''u''.

...sotopes weighted by abundance—of boron is 10.811 u, where u is the [[unified atomic mass unit]]. Boron has two stable isotopes:

...> of the most abundant [[isotope]], ¹²C, is by definition the [[unified atomic mass unit]]: ''A''(¹²C) ≡ 12 u.

...n]]s and two [[neutron]]s, thus having a mass close to 4 u (u stands for [[unified atomic mass unit]]). More precisely: ''m''_&alpha; = 4.001 506 179 127 u.<ref> [ht

<td bgcolor="#CCCCFF" align="center">'''Atomic Mass ([[unified atomic mass unit|u]])'''</td>

...s weighted by abundance&mdash;of oxygen is 15.9994 u. (The unit u is the [[unified atomic mass unit]]). The following are the atomic masses of the stable isotopes with their a

Masses (in [[unified atomic mass unit]] u), and abundances (percentage in brackets) are:

...s compute &Delta;U from a mass balance, where we use as unit of mass the [[unified atomic mass unit]] (u),

...molecules; in general, they have a mass of more than 1000 [[Dalton]] (or [[unified atomic mass unit]]), but the molecular weight of some can be as large as millions of Daltons

...molecules; in general, they have a mass of more than 1000 [[Dalton]] (or [[unified atomic mass unit]]), but the molecular weight of some can be as large as millions of Daltons