HyperDic: magic_number

English > 1 sense of the expression magic number:
NOUNquantitymagic numberthe atomic number of an extra stable strongly bound atomic nucleus
English > magic number: 1 sense > noun 1, quantity
MeaningThe atomic number of an extra stable strongly bound atomic nucleus: 2, 8, 20, 28, 50, 82 or 126.
Broaderatomic numberThe order of an element in Mendeleyev's table of the elements

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