Every good theory is prophetic; but few generalizations have been so strikingly verified in this respect as has the periodic law.
There are a few elements still missing, according to the periodic law which has been so valuable in chemistry.
In 1869 Mendelejeff published his celebrated memoir, and the periodic law took its place as a distinct addition to science.
So very soon the periodic law took its place as one of the most important generalizations of chemical science.
Mendeleeff gave the discovery fullest expression, explicating it in 1869, under the title of "the periodic law."
This arrangement brought to light a great generalization, now known as the periodic law.
Under the periodic law they are difficult to classify; they seem to belong nowhere; they simply exist, unsocial, alone.
The periodic law has proved of much value in the development of the science of chemistry.
periodic law n.
The principle that properties of elements recur periodically as atomic numbers increase.