# What Does Atomic Mass Mean?

The atomic mass is the total mass of an atom as defined by the sum of all its subatomic particles. These particles are protons, neutrons, and electrons.
atomic mass
NOUN [CHEMISTRY]
1.
the mass of an isotope of an element measured in units formerly based on the mass of one hydrogen atom taken as a unit or on 1/16 (0.0625) the mass of one oxygen atom, but after 1961 based on 1/12 (0.0833) the mass of the carbon-12 atom. Abbreviation: at. m.
Source: Dictionary.com
Q&A Related to "What Does Atomic Mass Mean"
 The atomic mass of sodium (Na) is 22.9897 atomic mass units. Sodium has 11 protons and electrons and likes to form ionic bonds by giving away one of its electrons. http://answers.ask.com/Science/Mental/what_is_the_...
 1. Write out the chemical formula of the compound whose atomic mass you want to calculate. The chemical formula provides the number of atoms in one molecule of a compound (i.e. the http://www.ehow.com/how_4516596_calculate-atomic-m...
 1 Understand how atomic mass is represented. Atomic mass, the mass of a given atom or molecule, can be expressed in standard SI mass units - grams, kilograms, etc. However, because http://www.wikihow.com/Calculate-Atomic-Mass
 Since the Earth is not a single atom, nor a collection of similar atoms, it does not have an atomic mass. Atomic mass is a measure of how much matter is contained by a specific atom http://wiki.answers.com/Q/What_is_the_earths_atomi...
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