出典:Wikipedia
出典:『Wikipedia』 (2011/07/21 07:47 UTC 版)
In physics, a nucleon is a collective name for two particles: the neutron and the proton. These are the two constituents of the atomic nucleus. Until the 1960s, the nucleons were thought to be elementary particles. Now they are known to be composite particles, each made of three quarks bound together by the so-called strong interaction.
硝酸.
核分裂.
亜硝酸.
the protoplasm that constitutes the nucleus of a cell
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