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atomic mass
This term is a technical specification used primarily in chemistry and physics to describe the mass of a single atom. It is distinct from molar mass, which refers to the mass of one mole of a substance, although the numerical values are often identical.
Because it describes a specific physical property of an element, it is treated as an uncountable noun. It does not typically take a plural form in scientific discourse, as the concept refers to a constant value for a specific isotope or a weighted average for an element.
Meanings
Examples
The teacher asked us to find the atomic mass of gold on the periodic table.
Calculate the average atomic mass by accounting for all naturally occurring isotopes.
I wonder why the atomic mass of this element is so much higher than expected.
The atomic mass is primarily determined by the number of protons and neutrons in the nucleus.
We need to determine the relative atomic mass for the stoichiometry problem.
The measured atomic mass differs slightly from the theoretical value.
Check the periodic table to verify the atomic mass of oxygen.
The researcher noted a discrepancy in the calculated atomic mass of the new isotope.
The researcher noted a discrepancy in the calculated atomic mass of the new isotope.