Who developed the periodic table of elements?

Who developed the periodic table of elements?

• A. Albert Einstein
• B. John Dalton
• C. Dmitri Mendeleev
• D. Henry Moseley

Answer: (C)

The periodic table of elements was developed by Dmitri Mendeleev in the 19th century. Mendeleev's work was groundbreaking because he arranged the known elements based on their atomic masses and identified a periodic pattern of properties among them. This organization allowed him to predict the existence and properties of elements that had not yet been discovered, which showcased the predictive power of the periodic law he formulated. Mendeleev’s table not only systematized the elements but also highlighted the periodicity in their properties, such as reactivity and atomic mass. His innovative approach laid the foundation for the modern periodic table, which is arranged by atomic number rather than atomic mass but retains the periodic relationships Mendeleev identified. While other scientists contributed to the development of atomic theory and the understanding of elements, such as Albert Einstein, who is known for his work in physics, John Dalton, who proposed the atomic theory, and Henry Moseley, who further refined the periodic table by establishing atomic numbers, it was Mendeleev who first created a comprehensive framework that recognized the periodicity of certain properties among the elements.

The periodic table of elements was developed by Dmitri Mendeleev in the 19th century. Mendeleev's work was groundbreaking because he arranged the known elements based on their atomic masses and identified a periodic pattern of properties among them. This organization allowed him to predict the existence and properties of elements that had not yet been discovered, which showcased the predictive power of the periodic law he formulated.

Mendeleev’s table not only systematized the elements but also highlighted the periodicity in their properties, such as reactivity and atomic mass. His innovative approach laid the foundation for the modern periodic table, which is arranged by atomic number rather than atomic mass but retains the periodic relationships Mendeleev identified.

While other scientists contributed to the development of atomic theory and the understanding of elements, such as Albert Einstein, who is known for his work in physics, John Dalton, who proposed the atomic theory, and Henry Moseley, who further refined the periodic table by establishing atomic numbers, it was Mendeleev who first created a comprehensive framework that recognized the periodicity of certain properties among the elements.