Actinides in a sentence

All actinides are radioactive and release energy upon radioactive decay; naturally occurring uranium and thorium, and synthetically produced plutonium are the most abundant actinides on Earth.

The lanthanides and the remaining actinides are then separated from the aqueous residue ( raffinate ) by a diamide-based extraction to give, after stripping, a mixture of trivalent actinides and lanthanides.

All but one of the actinides are f-block elements, corresponding to the filling of the 5f electron shell ; lawrencium, a d-block element, is also generally considered an actinide.

Americium is relatively soft and easily deformable and has a significantly lower bulk modulus than the actinides before it: Th, Pa, U, Np and Pu.

Berkelium is relatively soft and has one of the lowest bulk moduli among the actinides, at about 20 GPa (2 × 10 10 Pa).

Compared to the lanthanides, which (except for promethium ) are found in nature in appreciable quantities, most actinides are rare.

Coordination numbers are normally between two and nine, but large numbers of ligands are not uncommon for the lanthanides and actinides.

Fast reactors have the potential to produce less transuranic waste because all actinides are fissionable with fast neutrons, citation but they are more difficult to build and more expensive to operate.

However, a serious concern is the extremely high radiotoxicity of actinides and their migration in the environment.

If advanced breeder reactors could be designed in the future to efficiently utilize recycled or depleted uranium and all actinides, then the resource utilization efficiency would be further improved by an additional factor of eight.

In that year he noted that the best method for presenting the actinides seemed to be by positioning them below, and as analogues of, the lanthanides.

Its chemistry is typical for the late actinides, with a preponderance of the +3 oxidation state but also an accessible +2 oxidation state.

Long core life is enabled by high uranium enrichment and by incorporating a " burnable neutron poison ", which is progressively depleted as non-burnable poisons like fission products and actinides accumulate.

Mendelevium can finally be separated from the other trivalent actinides using selective elution from a cation-exchange resin column, the eluant being ammonia α-HIB.

Np(V) does not bond as readily to soil particles in mildly acidic conditions as its fellow actinides americium and curium by nearly an order of magnitude.

Of the actinides, primordial thorium and uranium occur naturally in substantial quantities and small amounts of persisting natural plutonium have also been identified.

Regardless of its oxidation state, the element exhibits a much greater mobility than the other actinides, largely due to its ability to readily form aqueous solutions with various other elements.

Some of these BTP-type complexes selectively interact with curium and therefore are useful in its selective separation from lanthanides and another actinides.

Such separation relies on the fact that berkelium easily oxidizes to the solid +4 state and precipitates, whereas other actinides, including einsteinium, remain in their +3 state in solutions.

Synthesis of einsteinium from naturally occurring actinides uranium and thorium in the Earth crust requires multiple neutron capture, which is an extremely unlikely event.