What discovery proved Mendeleev's periodic table to be correct and Newlands' to bewrong? The discovery of protons and isotopes The discovery of oxygen and nitrogen The discovery of electron shells The discovery of atomic weight 0/1

The discovery of protons and isotopes proved Mendeleev's periodic table to be correct and Newlands' to be wrong. Understanding the role of atomic number (the number of protons) in organizing elements led to the modern periodic table, which accurately reflects the properties and relationships of elements based on their atomic structure. What discovery proved Mendeleev's periodic table to be correct and Newlands' to be wrong? Mendeleev's periodic table was organized based on atomic mass and predicted the existence and properties of elements yet to be discovered. When protons and isotopes were discovered, it was found that the elements should be arranged based on their atomic number (the number of protons in the nucleus) rather than just their atomic mass. This fundamental understanding of atomic structure, incorporating the number of protons, provided the basis for the modern periodic table. Isotopes are different forms of an element that have the same number of protons but different numbers of neutrons. They have the same atomic number but different atomic masses. Mendeleev's periodic table couldn't account for the arrangement of isotopes, while the concept of atomic number resolved this issue and led to the correct arrangement of elements in the periodic table. Newlands' periodic table, on the other hand, was based on the Law of Octaves, which arranged elements in groups of eight. However, this pattern was not consistent across all elements, and it failed to accommodate newly discovered elements. Learn more about the periodic table: brainly.com/question/15987580 #SPJ3

Final answer: The discovery of isotopes and atomic numbers validated Mendeleev's periodic table and showed it to be more precise and accurate than Newlands'. This aligned all elements into the correct position within the table. Therefore the correct option is A. Explanation: The discovery that confirmed Mendeleev's periodic table over Newlands' was the discovery of isotopes and the concept of atomic numbers. Mendeleev's table was arranged by increasing atomic weight, which mostly aligned with the atomic numbers that we use today. However, some elements had slightly incorrect positions because Mendeleev didn't know about isotopes or atomic numbers. With the discovery of isotopes and atomic numbers, all elements could be placed precisely in the table, fully validating Mendeleev's prediction and proving his table to be more accurate than Newlands' The complete question is shown below: What discovery proved Mendeleev's periodic table to be correct and Newlands' to be wrong? A. The discovery of protons and isotopes B. The discovery of oxygen and nitrogen C. The discovery of electron shells D. The discovery of atomic weight Learn more about Periodic Table here: brainly.com/question/35461104 #SPJ3