For scale, these weapons were at least 500 times as strong as the first atomic bomb. To put the size of history's largest nuclear ... followed by the radiation radius. In the pink radius, almost ...

However, the element has some intriguing properties: It is one of the only elements with no known stable form, and it has the largest atomic radius. Why is it still so hard to make nuclear weapons?

The periodic table’s arrangement also allows scientists to discern trends in element properties, including electronegativity, ionization energy, and atomic radius. Many scientists worked on the ...