Journal - Franklin Institute of the State of Pennsylvania (1826)
Franklin Institute, Philadelphia, Franklin Institute (Philadelphia, Pa.) · [Philadelphia : Franklin Institute] · leaf 695
am D. Harkixs. [J. F. I. at Fig. 26, which plots the specific magnetic susceptibilities of theelementary substances against the atomic number, shows thatthere is considerable resemblance to Fig. 24, but none to any formof figure which represents nuclear periodicities, so at least thevariation of… … Atomic 10Number a /8-change, in which the atomic weight remains constant, thegroup number is increased by one. This is known as the displace-ment rule of Soddy, Fajans, and others. Evidently in the lossof an a-^-particle the nucleus loses two of its net positive charges,so the number of planetary…
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