| Going down a column on the periodic table the atomic numbers differ by eight between rows one and two and two and three. |
| Barium is the fifth element in Group 2 of the periodic table, the alkaline earth elements. |
| The chemical elements are grouped into sets in the periodic table based on the chemical behavior they have in common. |
| Consequently, hahnium has a chance of rejoining the periodic table, and even the French joliotium might make into the pantheon. |
| This periodic table was spotted last week in Miami in the window of an Armani shop. |
| This weight is the number assigned to each of the chemical elements in the periodic table. |
