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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.

Synonyms

  • Nucleon Number
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