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 ...

rare earths in relation to the periodic table. The group of elements known as the “rare ... 9 106.7 (44) ' (45) (48) Xe 180.2 (04) Ag 107.88 (47) Cd 112.40 (48) In 114.8 (49) Sn 119.0 (60 ...

But how many of these elements do you know? Test your knowledge and compete with other Live Science readers to see who can ...

But the story of element 87 begins much earlier than its discovery date in 1939. When Mendeleev first proposed his periodic table in 1869 he left gaps for elements not yet discovered, but that he ...

You're listening to Chemistry in its element brought to you by Chemistry World, the magazine of the Royal Society of Chemistry. Keeping up with the neighbours is rarely a concern in the periodic table ...