What is the birthdate of this English physicist, who published first the Long Form periodic table or Modern periodic table and published Moseley's Law?
Moseley's law Moseley's law is an empirical law concerning the characteristic x-rays that are emitted by atoms. The law was discovered and published by the English physicist Henry Moseley in 1913. It is historically important in quantitatively justifying the conception of the nuclear model of the atom, with all, or nearly all, positive charges of the atom located in the nucleus, and associated on an integer basis with atomic number. Until Moseley's work, "atomic number" was merely an element's place in the periodic table, and was not known to be associated with any measureable physical quantity. Moseley was able to show that the frequencies of certain characteristic X-rays emitted from chemical elements are proportional to the square of a number which was close to the element's atomic number; a finding which supported Van den Broek and Bohr's model of the atom in which the atomic number is the same as the number of positive charges in the nucleus of the atom. In brief, the law states that the square root of the frequency of the emitted x-ray is proportional to the atomic number.
Alice Leigh-Smith Alice Leigh-Smith (née Prebil) was an English nuclear physicist. She married Philip Leigh-Smith, the son of the Arctic explorer Benjamin Leigh-Smith, in 1933. She was a student of Marie Curie and was the first British woman to receive a PhD in nuclear physics. She, together with Walter Minder, announced the discovery of element 85 (now called astatine) in 1942. They proposed the name anglohelvetium for the new element. Later it was proven that in fact Walter Minder had not discovered element 85. Leigh-Smith was also involved in the use of radioactive substances as a treatment for cancer.