Geometrical illustrations of Newlands' and Mendelejeff's periodic law of the atomic weights of the chemical elements / by Samuel Haughton.

  • Samuel Haughton
Date:
1888
Catalogue details

Licence: Public Domain Mark

Credit: Geometrical illustrations of Newlands' and Mendelejeff's periodic law of the atomic weights of the chemical elements / by Samuel Haughton. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

    14/20 page 90
    PART II.—THE THIRD AND FOURTH PERIODS OF SEVEN ELE- MENTS FOLLOWING CHLORINE; OR, TEE TITANIUM- GERMANIUM ROUBLE FERIOE. [Read May 14, 1888.] I now proceed to the discussion of the third and fourth periods of seven elements each. Third Period, or Titanium Period. ELEMENT. ATOMIC WEIGHT. VALENCY. 1. Potassium. 39 Monad. 2. Calcium. 40 Dyad. 3. Scandium.1 44-45 Triad. 4. Titanium. 48 Tetrad. 5. Vanadium. 51 Triad. 6. Chromium. 52 Dyad. 7. Manganese. 55 Monad. Fourth Period, or Germanium Period. ELEMENT. ATOMIC WEIGHT. VALENCY. 1. Copper. 63 Monad. 2. Zinc. 65 Dyad. 3. Gallium (Ekaluminium). 69 Triad. 4. Germanium (Eka Silicium). 72 Tetrad. 5. Arsenic. 75 Triad. 6. Selenium. 79 Dyad. 7. Bromine. 80 Monad. 1 The atomic weight of scandium lies between 44 and 45, but nearer to 44.
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