| NOUN | quantity | atomic number | the order of an element in Mendeleyev's table of the elements |
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| Meaning | 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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| Narrower | magic number | The atomic number of an extra stable strongly bound atomic nucleus |
| Broader | number | A concept of quantity involving zero and units |
| Spanish | número atómico | |
| Catalan | nombre atòmic | |
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