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 ...

A total of 25 transuranium elements have now been artificially ... This podcast is about one of these elements, number 107 in the periodic table, called bohrium. Transuranium elements are essentially ...

For the last fifty or so years, the periodic table has been incomplete. Elements after uranium on the periodic table have been synthesized for the past few decades, but there were always a few ...

The 25%, and we get 35.5 to one decimal place and that’s what you’ll see if you look for chlorine in the periodic table. So the relative atomic mass considers all the isotopes of an element.

This year marks the 150th anniversary of the publication of Mendeleev’s Periodic Table of Chemical Elements in 1869. In celebration, the United Nations Educational, Scientific, and Cultural ...