Americium in a sentence

Americium(II) oxide was prepared in minute amounts and has not been characterized in details. citation Americium(III) oxide is a red-brown solid with a melting point of 2205 °C.

Both americium and curium are present in solutions mostly in the +3 valence state; whereas americium oxidizes to soluble Am(IV) complexes, curium remains unchanged and can thus be isolated by repeated centrifugation.

Crystals of americium hexahydrate (AmCl 3 ·6H 2 O) can be prepared by dissolving americium dioxide in hydrochloric acid and evaporating the liquid.

First, americium ( 241 Am) nitrate solution was coated on a platinum foil, the solution was evaporated and the residue converted by annealing to americium dioxide (AmO 2 ).

Therefore, any primordial americium (americium that was present on Earth during its formation) should have decayed by now.

To separate berkelium from the unreacted americium, this solution was added to a mixture of ammonium and ammonium sulfate and heated to convert all the dissolved americium into the oxidation state +6.

Unoxidized residual americium was precipitated by the addition of hydrofluoric acid as americium(III) fluoride ( AmFmain ).

Wiberg, p. 1972 Americium(IV) oxide is the main form of solid americium which is used in nearly all its applications.

A large amount of work has been done on the solvent extraction of americium.

Although most americium isotopes predominantly emit alpha particles which can be blocked by thin layers of common materials, many of the daughter products emit gamma-rays and neutrons which have a long penetration depth.

Americium-241 is also suitable for calibration of gamma-ray spectrometers in the low-energy range, since its spectrum consists of nearly a single peak and negligible Compton continuum (at least three orders of magnitude lower intensity).

Americium compounds with oxidation state +4 and higher are strong oxidizing agents, comparable in strength to the permanganate ion ( MnOmain ) in acidic solutions.

Americium(III) fluoride was first used for this purpose.

Americium is a highly radioactive element.

Americium is a relatively soft radioactive metal with silvery appearance.

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.

Atomic radii main Atomic number plotted against atomic radius The noble gases, astatine, francium, and all elements heavier than americium were left out as there is no data for them.

Both Am and Cm are mostly present in solutions in the +3 valence state; whereas curium remains unchanged, americium oxidizes to soluble Am(IV) complexes which can be washed away.

He also adds "The reason is not that americium is fundamentally less dangerous than the elements around it.

Health concerns As a highly radioactive element, americium and its compounds must be handled only in an appropriate laboratory under special arrangements.