atomic mass
Isotope-weighted element measurement
Atomic mass is the mass of an atom, typically expressed in atomic mass units.
For a specific isotope, it reflects the actual mass of protons, neutrons, and electrons.
For an element as found in nature, the atomic mass averages the masses of all its isotopes weighted by their natural abundance: The atomic mass of chlorine is about 35.5 because it's a mixture of two isotopes.
Elemental variant by mass
- nucleonsProtons or neutrons
- neutronsUncharged subatomic particles
- protonsPositive nuclear particles
- nuclideAtom classified by nucleus
radioisotope · carbon-12 · carbon-14 · uranium-235 · uranium-238 · tritium · deuterium · radioactive decay
Basic substance or factor
- periodic tableSystematic display of elements
- stoichiometryQuantitative chemical reaction analysis
- molesBurrowing insectivore mammals
- compoundCombined into one
molecule · chemical formula · molecular weight · weighted average
Wavelength-separating recording instrument
- precisionAccuracy of measurement
- calibrationAdjusting for measurement accuracy
- reference standardAccepted measurement baseline
- quantificationExpressing something numerically
isotope
Elemental variant by mass
nuclide · radioisotope · carbon-12 · carbon-14 · uranium-235 · uranium-238 · tritium · deuterium · radioactive decay · half-life
element
Basic substance or factor
- periodic tableSystematic display of elements
- stoichiometryQuantitative chemical reaction analysis
- molesBurrowing insectivore mammals
compound · molecule · chemical formula · molecular weight · weighted average
spectrograph
Wavelength-separating recording instrument
- precisionAccuracy of measurement
- calibrationAdjusting for measurement accuracy
- reference standardAccepted measurement baseline
- massmasses, bulk, biomass, matter, substance
- mattermatter, molecules, molecule, element, elements
- weightsgram, kilogram, ounce, pound, ton
- atomic physicselectron, neutron, proton, nucleus, electrons
- atomic scienceelectron, proton, neutron, nucleus, element
- chemistryorganic chemistry, molecule, chemistry, molecules, elements
mass, atom, atomic, atoms, subatomic, atomism, atomistic, atomically, atomic structure