Mass Number (Noun)
Meaning
The sum of the number of neutrons and protons in an atomic nucleus.
Classification
Nouns denoting quantities and units of measure.
Examples
- The mass number of an atom is a key factor in determining its atomic mass, as it takes into account the sum of the protons and neutrons present in its nucleus.
- Each isotope of a chemical element has a unique mass number due to variations in the number of neutrons present in the nucleus.
- By determining the mass number of a radioactive sample, scientists can estimate its age based on its isotopic composition.
- Understanding the concept of mass number is crucial for chemistry and physics students as it relates to various phenomena in atomic physics.
- Variations in the mass number result in isotopes with different properties and half-lives.