Moseley's Periodic Table


Definition - What does Moseley's Periodic Table mean?

Moseley’s periodic table is the modern form of the periodic table that is used today. While the original periodic table was developed earlier by Dmitri Mendeleev, it contained inconsistencies. Henry Moseley solved these inconsistencies by determining that the properties of elements were a function of their atomic numbers, i.e., the number of protons in the nucleus of the atom. Since this discovery, elements in the periodic table are arranged in order of increasing atomic number.

Corrosionpedia explains Moseley's Periodic Table

The original periodic table developed by Mendeleev in 1869 consisted of elements arranged in order of increasing atomic mass. However, it was soon discovered that arranging elements in this manner did not correlate with the position predicted by their chemical properties. In 1913, Moseley found that there was a more fundamental property to elements than their atomic weight.

This led Moseley to discover the importance of the atomic number. He discovered that every element’s unique identity and property could be determined by the number of protons in its nucleus. This discovery also enabled him to predict the existence of new chemical elements, all of which were found.

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