Lesson: History of the Periodic Table Science • Second Year of Preparatory School

Students will be able to

• name some of the scientists who contributed to the development of the periodic table,
• describe who Mendeleev was and his contribution to developing the periodic table,
• describe how Mendeleev ordered the elements into groups and periods,
• explain the advantages and disadvantages of Mendeleev’s table,
• recognize that Mendeleev predicted the properties of unknown elements, which were later discovered,
• describe how Moseley ordered the elements based on their atomic number,
• describe how the modern periodic table is based on atomic number and the filling of energy sublevels.