History of the Periodic Table: The development of the periodic table as a result of the contributions of Mendeleev and Moseley is traced. Students learn how the organization of the periodic table and its periodic tendencies relate to electron distribution and se the periodic table to write electron distributions.
Organization of the Periodic Table: Periods and families in the periodic table are described. Students learn to determine the number of energy levels and valence electrons in an atom of an element from its placement on the table. They also learn to determine if an element is a metal, nonmetal, or metalloid and if an element is a solid, liquid, or gas at room temperature.
A nuclear chemist aims to create entirely new elements to add to the periodic table.
Explore an interactive periodic table, combine elements to make real stuff, and watch the two-hour NOVA program.
Think you know the periodic table? See how quickly you can name the mystery elements we describe.
Trends on the Periodic Table: Students learn to describe the pattern in atomic number, atomic mass, atomic radius, ionization energy, and electron affinity as they look across a period and down a family of the periodic table. They then learn to predict the charge an atom of an element will have when it forms an ion based on the element's location on the periodic table.