There are currently 118 known elements listed on the periodic table; from hydrogen ... by bombarding plutonium-244, an ...

Eighty out of the first 82 elements in the periodic table have stable isotopes. Measuring and analysing their distribution allows for many practical applications. The IAEA assists Member States in ...

When the first periodic table was formulated by Mendeleev ... We know this because even the longest-lived isotope of the element has a half-life that is too short in comparison with the age ...