Periodic Table of Elements and Chemistry

The number of elements in a period increases as one moves down the periodic table because as the energy level of the atom increases, the number of energy sub-

Scientists Say: Periodic table In the periodic table, elements are lined up by atomic number, the number of protons they have An element's

elements This periodic table chart lists elements by name in alphabetical order including the element symbol, atomic number, and Pauling electronegativity value for

table Explore the Periodic Table in a clear and interactive view Hover over the groups, see the atomic numbers, view the symbols and more!