And scientists are still debating its optimum configuration. Some believe chemical properties should dictate how the elements line up on the periodic ... in the 8p orbital. This table is, of ...

Elements that occupy the same column on the periodic table (called a "group") have identical valence electron configurations ... six electrons in its outermost orbital. You can also figure out ...

By element 57, lanthanum, the electrons begin to enter a new type of orbital, an f-orbital. To account for this, most periodic ... to electron configuration, which would leave the table as it ...

The periodic table of chemical elements, often called the periodic table, organizes all discovered chemical elements in rows (called periods) and columns (called groups) according to increasing atomic ...