atomic weight
Element's average mass
Atomic weight is the average mass of an atom of an element, measured relative to carbon-12.
It accounts for the natural abundance of an element's isotopes, which is why atomic weights are rarely whole numbers.
The atomic weight of chlorine is about 35.5.
Also called relative atomic mass.
measurement
Protons and neutrons combined
- molar massGrams per mole measurement
- weighted averageMean adjusted by significance
- carbon-12Stable carbon isotope
- reference standardAccepted measurement baseline
mass number
Protons and neutrons combined
- molar massGrams per mole measurement
- weighted averageMean adjusted by significance
- carbon-12Stable carbon isotope
- weightpound, pounds, kilogram, kilograms, gram
- atomic physicselectron, neutron, proton, nucleus, electrons
- atomic scienceelectron, proton, neutron, nucleus, element
- chemistryorganic chemistry, molecule, chemistry, molecules, elements
- Nuclearnuclear reactor, nuclear energy, uranium, nuclear fusion, nuclear power
- element propertiessymbol, electronegativity, melting point, boiling point, valence electrons