HyperDic: magic_number

English > 1 sense of the expression *magic number*:
NOUN	quantity	magic number	the atomic number of an extra stable strongly bound atomic nucleus

English > *magic number*: 1 sense > noun 1, quantity
Meaning	The atomic number of an extra stable strongly bound atomic nucleus: 2, 8, 20, 28, 50, 82 or 126.
Broader	atomic number	The order of an element in Mendeleyev's table of the elements