Sentence examples for undiscovered elements from inspiring English sources
The discoveries fill a gap at the furthest edge of the periodic table and hint strongly at a weird landscape of undiscovered elements beyond.
However, there is a theory that revolves around the Island of Stability that indicates that some undiscovered elements may exist stably but they would be very radioactive.
He did not claim priority for his achievement, and he admitted that he had been reluctant to predict the existence of undiscovered elements as Mendeleyev had done.
Mendeleyev was also able to predict the existence, and many of the properties, of the then undiscovered elements eka-boron, eka-aluminum, and eka-silicon, now identified with the elements scandium, gallium, and germanium, respectively.
The regularities in the alpha-particle decay energies that have been noted from experimental data can be plotted on a graph and, since the alpha-particle decay half-life depends in a regular way on the alpha-particle decay energy, the graph can be used to obtain the estimated half-lives of undiscovered elements and isotopes.
Mendeleev's flash of insight (he later claimed to have seen his whole grand construct in a dream) also allowed him to infer the existence of as yet undiscovered elements – holes in the brickwork of known elements – and even to predict their properties.
There may, Heikal believes, be some as yet undiscovered element in the atrocity of September 11.
Mendeleev noted a gap in his periodic table and gave the undiscovered element the provisional name ekamanganese (Em).
In 1796, Müller sent part of the sample to the German chemist Martin Klaproth, who purified the undiscovered element.
The existence of a yet undiscovered element at this position in the periodic table had been first predicted by Dmitry Mendeleev.
Being the first period 8 element, the undiscovered element ununennium (element 119) is predicted to be the next alkali metal after francium and behave much like their lighter congeners; however, it is also predicted to differ from the lighter alkali metals in some properties.
