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Apr
The average mass of an atom of an element as it occurs in nature that is expressed in atomic mass units. The average mass of an atom of an element as it occurs in nature that is expressed in atomic mass units.
The atomic weight is also known as the relative atomic mass.
Atomic weight definition chemistry. Atomic weight is the average mass of atoms of an element calculated using the relative abundance of isotopes in a naturally occurring element. It is the weighted average of the masses of naturally occurring isotopes. What is it based on.
Prior to 1961 a unit of atomic weight was based on 1 16th 0 0625 of the weight of an oxygen atom. Atomic weight ratio of the average mass of a chemical element s atoms to some standard. Since 1961 the standard unit of atomic mass has been one twelfth the mass of an atom of the isotope carbon 12.
Atomic weight is measured in atomic mass units amu also called daltons. Atomic weight definition is the mass of one atom of an element. The average mass of an atom of an element as it occurs in nature that is expressed in atomic mass units.
Definition of atomic weight. The atomic weight is defined as the average atomic mass of isotopes of an element in a given sample. It is the weighted average atomic mass calculated using the relative abundance of isotopes of an element.
The atomic weight is also known as the relative atomic mass. The atomic weight is denoted by the symbol a r. Definition of atomic weight 1 weighted average of the masses of the constituent isotopes of an element.
The relative masses of atoms of different elements. 2 the weight in grams of one mole of the chemical element. Approximately the number of protons and neutrons in the nucleus.
Atomic weight definition the average weight of an atom of an element formerly based on the weight of one hydrogen atom taken as a unit or on 1 16 0 0625 the weight of an oxygen atom but after 1961 based on 1 12 the weight of the carbon 12 atom. Chemistry glossary definition of atomic weight and examples. The atomic weight is the average mass of the atoms of an element calculated using the relative abundance of isotopes in a natural element.
It is the weighted average of the masses of natural isotopes. The name its history definition and units 1539 for mass measurements another problem arises from the same principle of the si. The unit for mass now is the kilogram.
A major change would be needed to substitute an atomic mass unit such as a twelfth of the rest mass of one atom of 12c in its ground state. The average mass of a chemical element expressed in atomic mass units. The atomic weight of an element having more than one principal isotope is calculated both from the atomic masses of the isotopes and from the relative abundance of each isotope in nature.
Atomic mass or weight definition atomic mass which is also known as atomic weight is the average mass of atoms of an element calculated using the relative abundance of isotopes in a naturally occurring element. Atomic mass indicates the size of an atom.