Science Assignment (notebook) DATE 07-24-25 NO. 1. What's the name of the one who the periodic table (2 person) 2. What are their contrubitionion on the periodic table 3. try to understand the periodic table
Answer (1)
Answer:1.Dmitri MendeleevHenry Moseley2. Dmitri Mendeleev: created the first version of the periodic table in 1869. He arranged elements by atomic mass and left gaps for elements not yet discovered, predicting their properties accurately.Henry Moseley: he improved the periodic table by arranging elements by atomic number (number of protons) in 1913, which corrected some mistakes in Mendeleev’s table and led to the modern periodic table.3. periodic table is a chart that organizes all known chemical elements based on their atomic number, electron configuration, and chemical properties. Elements are arranged in rows (periods) and columns (groups or families). Elements in the same group usually have similar properties. It helps scientists understand how elements behave and interact.
