Actinium is a chemical element; it has symbol Ac and atomic number 89. It was first isolated by Friedrich Oskar Giesel in 1902, who gave it the name emanium;...

Actinium (89Ac) has no stable isotopes and no characteristic terrestrial isotopic composition, thus a standard atomic weight cannot be given. There are...

chemical elements in the 5f series, with atomic numbers from 89 to 102, actinium through nobelium. (Number 103, lawrencium, is sometimes also included despite...

Actinium-225 (225Ac, Ac-225) is an isotope of actinium. It undergoes alpha decay to francium-221 with a half-life of 10 days, and is an intermediate decay...

radioactive; its most stable isotope, francium-223 (originally called actinium K after the natural decay chain in which it appears), has a half-life of...

Center. The 4n+3 chain of uranium-235 is commonly called the "actinium series" or "actinium cascade". Beginning with the naturally-occurring isotope uranium-235...

Actinium(III) hydroxide is a white radioactive solid with the chemical formula of Ac(OH)3. Actinium(III) hydroxide may be formed from soluble actinium...

Unbiunium, also known as eka-actinium or element 121, is a hypothetical chemical element; it has symbol Ubu and atomic number 121. Unbiunium and Ubu are...

chemistry texts often put scandium (Sc), yttrium (Y), lanthanum (La), and actinium (Ac) in group 3, so that Ce–Lu and Th–Lr become the f-block between groups...

Actinium(III) chloride is a chemical compound containing the rare radioactive element actinium. This salt has the formula AcCl3. Molecular weight of the...

(like lanthanum, praseodymium and dysprosium) and the actinides (like actinium, uranium and einsteinium). The group 12 elements zinc, cadmium, and mercury...

89 may refer to: 89 (number) Atomic number 89: actinium 89ers, a German Eurodance duo 89 Julia, a main-belt asteroid 89 BC AD 89 1989 2089 etc. All pages...

Actinium(III) oxide is a chemical compound containing the rare radioactive element actinium. It has the formula Ac2O3. It is similar to its corresponding...

Actinium compounds are compounds containing the element actinium (Ac). Due to actinium's intense radioactivity, only a limited number of actinium compounds...

towards high oxidation states all the way from actinium to uranium, even though it is actually only actinium and thorium that have d-block-like configurations...

Godlewski, a Polish chemist from Kraków, and was historically known as actinium X (AcX). Radium-223 dichloride is an alpha particle-emitting radiotherapy...

Cerithidium actinium is a species of sea snail, a marine gastropod mollusk in the family Cerithiidae. Cerithidium actinium Rehder, 1980. Retrieved through:...

Actinium(III) fluoride (AcF3) is an inorganic compound, a salt of actinium and fluorine. Actinium fluoride can be prepared in solution or by a solid-state...

atomic numbers from 89 to 103, actinium through lawrencium. The actinide series is named after its first element actinium. All but one of the actinides...

the heavier members of group 3. The common placement of lanthanum and actinium in these positions is not supported by physical, chemical, and electronic...

Actinium(III) bromide is a radioactive white crystalline solid that is a salt of actinium. It is prepared by reacting actinium(III) oxide with aluminium...

radiochemistry, and several isotopes (namely those in the decay chains of actinium, radium, and thorium) bear placeholder names using the early naming system...

Actinium(III) sulfide is the radioactive compound of actinium with the formula Ac2S3. This salt was prepared by heating actinium(III) oxalate at 1400°C...

elements have any biological role. Historically, sometimes lanthanum (La) and actinium (Ac) were included in the group instead of lutetium and lawrencium, because...

Actinium oxyfluoride is an inorganic compound, with the chemical formula AcOF. It is radioactive. It crystallises in a calcium fluoride structure. It can...

ends of three decay chains: the uranium series (or radium series), the actinium series, and the thorium series, respectively; a fourth decay chain, the...

(element) Thallium Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium...

the element francium by purifying samples of lanthanum that contained actinium. In 1962, she was the first woman to be elected to the French Académie...

(element) Thallium Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium...

lungs. Hence, the dose to the lungs will be lower for the soluble form. Actinium can be naturally found in traces in uranium ore as 227Ac, an α and β emitter...