Answer:
The correct answer is d) supported
.
Explanation:
Moseley's law is an empirical law that establishes a systematic relationship between the frequency of x-rays emitted by different atoms with their atomic number. Enunciated in 1913 by British physicist Henry Moseley, it was possible to determine how many chemical elements were missing to discover up to uranium.
Henry Moseley, an English physicist began studying following the indications of Rutherford, the X-rays emitted by metals when bombarded with electrons. In 1913, he determined that each metal had a characteristic emission frequency that was proportional to the square of an integer that in the cases analyzed indicated the position of each element in the table.
Moseley's law determined that the periodic law would modify the sorting criterion by moving from the atomic mass to the atomic number that would later be identified with the number of protons in the nucleus.
Taking this into account, it was possible to determine the number of elements that were still to be discovered, those with atomic number 43, 61, 72, 75, 85, 87 and 91. The last of these, the French, was discovered in 1939 by the French chemistry Marguerite Perey.
