Henry Moseley

Henry Moseley was an English physicist known for his groundbreaking work in the early 20th century on atomic structure. In 1913, he determined that the atomic number, rather than atomic weight, should be used to arrange elements in the periodic table. This insight led to a clearer understanding of the periodic properties of elements and resolved inconsistencies in the table. Moseley’s work laid the groundwork for modern chemistry and physics, influencing how we understand element relationships. Tragically, he died young during World War I, but his contributions significantly advanced the field.