| atom |
(physics and chemistry) the smallest component of an element having the chemical properties of the element (nontechnical usage) a tiny piece of anything
출처: wordnet.princeton.edu/perl/webwn
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| atomic mass unit |
unit of mass for expressing masses of atoms or molecules
출처: wordnet.princeton.edu/perl/webwn
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| atomic energy |
the energy released by a nuclear reaction
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| atomic number |
the order of an element in Mendeleyev's table of the elements; equal to the number of protons in the nucleus or electrons in the neutral state of an atom of an element
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| atomic theory |
a theory of the structure of the atom atomism: (chemistry) any theory in which all matter is composed of tiny discrete finite indivisible indestructible particles; "the ancient Greek philosophers Democritus and Epicurus held atomic theories of the universe"
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