Nucleon
Nucleon
Nucleon (/njuːklɪɒn/) is a collective term for the particles that make up the atomic nucleus, namely the proton and the neutron.
Etymology
The term "nucleon" was coined in the early 20th century from the word "nucleus" (from Latin nucleus or nuculeus, meaning kernel or seed) and the Greek suffix "-on" (used in physics to denote a particle).
Definition
A nucleon is one of the particles that make up the atomic nucleus. Each atomic nucleus consists of one or more nucleons, and each atom in turn consists of a nucleus surrounded by one or more electrons. There are two known types of nucleon: the proton and the neutron.
Proton
A proton is a type of nucleon that carries a positive electric charge. The number of protons in an atomic nucleus determines the atomic number of an element.
Neutron
A neutron is a type of nucleon that carries no electric charge. Neutrons contribute to the mass of the atom but do not affect its chemical properties.
Related Terms
See Also
External links
- Medical encyclopedia article on Nucleon
- Wikipedia's article - Nucleon
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