 | 1913 - Liczba stron: 1420
...family of even number in the periodic table to the next lower numbered even family, the family of pdd number being always missed. Further, in the changes...family so resulting are not merely similar in chemical properties, but although one of them has lost an a-particle (helium) and has its atomic weight diminished... | |
 | 1913 - Liczba stron: 668
...family, the family of odd number being always missed. Further, in the changes in which the o-particle was not expelled the atom in several cases reverted...element of the fourth family, for example, expelling an o-particle and becoming a member of the second family, which after further changes reverts to the fourth... | |
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Radio-elements, p. 30) I stated the rule that held good in several cases, that when the a-particle was expelled the atom passed from a family of even number in the Periodic Table to the next lower-numbered even family, the family of odd number being always... 