Nearly 70 years after America made einsteinium in its first full-scale thermo-nuke experiment, mystery element yields secrets of its chemistry

Atom bond length of Es measured for the first time

Chemists have measured a fundamental chemical property of einsteinium, a mysterious and radioactive element that was discovered in the debris of America's first full-scale thernonuclear device test – the Ivy Mike shot in 1952.…

from The Register