series encompasses the 15 metallic chemical element s with atomic number s from 89 to 103,
actinium through lawrencium 3 element
actinium.
Kaynak: ActinideActinium(III) oxide is a chemical compound containing the rare radioactive element
actinium . It has the formula Ac 2 O 3. contains
Kaynak: Actinium(III) oxide Cerithidium
actinium is a species of sea snail , a marine gastropod mollusk in the family Cerithiidae Description: date May 2010
Kaynak: Cerithidium actiniumalso known as eka -
actinium or element 121, is the temporary name of a hypothetical chemical element in the periodic table that has
Kaynak: UnbiuniumActinium series: The 4n+3 chain of uranium-235 is commonly called the "
actinium series".
Actinium , astatine , bismuth , francium , lead ,
Kaynak: Decay chain It was formerly known as eka -caesium and
actinium K It is one of the two least electronegative elements, the other being caesium -.
Kaynak: FranciumSecondary decay products of thorium include radium and
actinium . In nature, virtually all thorium is found as thorium-232 , which
Kaynak: Thoriumdiscovery of the element In 1903, similar emanations were observed from
actinium by André-Louis Debierne and were called
Actinium Emanation (Ac Em).
Kaynak: RadonAndré-Louis Debierne (14 July 1874 – 31 August 1949) was a French chemist and is considered the discoverer of the element
actinium .
Kaynak: André-Louis DebierneRadium hydroxide is more soluble than hydroxides of other alkaline earth metals,
actinium, and thorium, and more basic than barium
Kaynak: Radium(La) and
actinium (Ac), or by lutetium (Lu) and lawrencium (Lr); less frequently, it is considered the group should be expanded to 32
Kaynak: Group 3 elementMany of these symbols were designated during the early years of radiochemistry , and several isotopes (namely those in the
actinium decay
Kaynak: Symbol (chemical element)Of these 14 transient elements, 7 (polonium , astatine , radon , francium , radium ,
actinium , and protactinium ) are relatively common
Kaynak: Chemical elementIt is sometimes represented by the symbol Ac (not to be confused with the element
actinium ). The acetyl group contains a methyl group
Kaynak: Acetyl(either lanthanum or lutetium, and either
actinium or lawrencium , respectively) shown in a single cell of the main table, between barium
Kaynak: Periodic table