An introduction to the study of chemistry / by Ira Remsen.

  • Ira Remsen
Date:
1890
Catalogue details

Licence: Public Domain Mark

Credit: An introduction to the study of chemistry / by Ira Remsen. Source: Wellcome Collection.

    395/410 (page 379)
    The elements whose symbols stand under each other in this table have similar chemical properties. This is marked in the case of lithium and sodium ; carbon and silicon ; nitrogen and phosphorus ; oxygen and sulphur ; and fluo- rine and chlorine. Proceeding in the same way, the ele- ment with the next higher atomic weight is potassium, 39.1. This comes in the same perpendicular line with lithium and sodium or with members of the same family. Then follow calcium, scandium, titanium, vanadium, chromium, and manganese, each of which falls naturally in the perpendicular line which contains elements allied to it. It has been found possible in this way to arrange all the elements in one table which exhibits the relations be- tween their atomic weights and properties. Several tables have been proposed, but they do not differ essentially from one another. That suggested by the Kussian chemist Mendelejeff is here given. The atomic weights used in the table have been calculated with care from the results of the most trustworthy determinations made by different chem- ists. In some cases they will be found to differ slightly from those in common use :