EVERYDAY SCIENCE

Detailed explanation-1: -Although Mendeleev is credited with developing the Periodic Table, it was a young British physicist named Henry Moseley who provided a scientifically rigorous classification scheme.

Detailed explanation-2: -In 1913, while working at the University of Manchester, he observed and measured the X-ray spectra of various chemical elements using diffraction in crystals. Through this, he discovered a systematic relation between wave-length and atomic number. This discovery is now known as Moseley’s Law.

Detailed explanation-3: -Moseley’s contribution to the periodic table was that he arranged the elements in the periodic table according to atomic numbers. He realized his findings indicated that the identity of an element is how many protons it has. The number of protons represents the atomic number of an element.

Detailed explanation-4: -Dmitri Mendeleev and Henry Moseley: The Fathers of the Periodic Table.

Detailed explanation-5: -In 1913 he used self-built equipment to prove that every element’s identity is uniquely determined by the number of protons it has. His discovery revealed the true basis of the periodic table and enabled Moseley to predict confidently the existence of four new chemical elements, all of which were found.