Actinium is a silvery radioactive metallic element. Actinium-225 is used in medicine to produce Bi-213 in a reusable generator or can be used alone as an agent for radio-immunotherapy. Actinium in the environment. It is found only in traces in uranium ores as 227-Ac, an α and β emitter with a half-life of 21.773 years.

227 u

Actinium-225 is unique among alpha emitters because it only has a 10-day half-life. (An isotope’s half-life is the amount of time it takes to decay to half of its original amount.) In fewer than two weeks, half of its atoms have turned into different isotopes.

Best Answer: The price of actinium is $100 per gram. Therefore, 100g of actinium would be $1000.. Seeing as it is about 150 times more radioactive than.

One of the more noteworthy actinium facts is that the element glows blue in the dark. The blue color comes from the ionization of gases in the air by radioactivity. Actinium is a silver-colored metal that has properties similar to those of lanthanum, the element located directly above it on the periodic table.

Actinium: Actinium is a radioactive metal, silver in color. Fun fact about Actinium: Actinium glows with a beautiful blue color in the dark, due to its intensely strong radioactivity! Chemical symbol: Ac. Atomic number: 89.

uranium ores

Friedrich Oskar Giesel

According to this definition, actinium, element 89, is the first member of the actinide series of elements, although it has no 5f electrons in its metallic, gaseous, or ionic forms. The chemistry of actinium closely follows that of lanthanum.

All isotopes of the actinides and actinium are radioactive. The unstable, radioactive actinide nuclei decay by emission of α particles, electrons, or positrons (β− or β+ decay, respectively).

Astatine is the rarest element on Earth; only approximately 25 grams occur naturally on the planet at any given time.

Lanthanum and actinium are usually regarded as d-block elements (Myers, Oldham & Tocci 2004, p. 130) and generally counted as lanthanides and actinides (the rest of which occupy the f-block).