Curium was only discovered in 1944, by Glenn Seaborg and his collaborators at the University of California, Berkeley, who, by bombarding atoms of plutonium with alpha particles (atoms of helium) synthesized a new,
very radioactive element.
Not exact matches
Since the neutron star propagates with an estimated speed of at least 350 kilometers per second, the asymmetry in the spatial distribution of the
radioactive elements is expected to be
very pronounced.
To detect
very small quantities of mobile
radioactive elements in the groundwater at former nuclear weapons production sites, researchers have developed a new type of sensor.
Since heavier
elements were built by radiation processes, they were
very radioactive when first made.
In any case, no - one is suggesting that the planet's core is getting hotter, which would be needed to actually make our planet warm; to the contrary, the planet will be
very slowly cooling as the
radioactive elements in the core providing this heat gradually lose their energy.
Problematic nuclear waste disposal for
very long - lived
radioactive elements (e.g. Yucca Mountain); 3.