31. The most important feature of actinium is its ability to accumulate and remain in the surface layer of skeletons. 32. Adsorption from the digestive tract is much smaller ( ~ 0.05 % ) for actinium than radium. 33. The " Ac " is not to be confused with the abbreviation for the chemical element actinium . 34. I know that the specific method I have to use takes into account the position of Lanthanum and Actinium . 35. As it decays, actinium -225 produces three daughter atoms, each of which also gives out alpha particles. 36. As with most lanthanides and many actinides, actinium assumes oxidation state + 3 in nearly all its chemical compounds. 37. The close similarity of physical and chemical properties of actinium and lanthanum makes separation of actinium from the ore impractical. 38. The close similarity of physical and chemical properties of actinium and lanthanum makes separation of actinium from the ore impractical. 39. Actinium reacts rapidly with oxygen and moisture in air forming a white coating of actinium oxide that impedes further oxidation.40. Actinium reacts rapidly with oxygen and moisture in air forming a white coating of actinium oxide that impedes further oxidation.
