Technetium — molybdenum ← technetium → ruthenium Mn ↑ Tc ↓ Re … Wikipedia
Caesium — xenon ← caesium → barium Rb ↑ Cs ↓ Fr … Wikipedia
Samarium — promethium ← samarium → europium ↑ Sm ↓ … Wikipedia
Actinide — The atomic bomb dropped on Nagasaki had a plutonium charge.[1] The actinide or actinoid (IUPAC nomenclature) series encompasses the 15 metallic chemical elements with atomic numbers from 89 to 103, actinium thro … Wikipedia
Cerium — lanthanum ← cerium → praseodymium ↑ Ce ↓ Th … Wikipedia
Fluoride volatility — is a method for the extraction of elements which form volatile fluorides. It is being studied for reprocessing of nuclear fuel, either of the conventional fuel rods used in today s LWRs, or as an integral part of a molten salt reactor… … Wikipedia
Molybdenum — niobium ← molybdenum → technetium Cr ↑ Mo ↓ W … Wikipedia
Halomethane — compounds are derivatives of methane (CH4) with one or more of the hydrogen atoms replaced with halogen atoms (F, Cl, Br, or I). Halomethanes are both naturally occurring, especially in marine environments, and man made, most notably as… … Wikipedia
Ozone depletion — Image of the largest Antarctic ozone hole ever recorded (September 2006) Ozone depletion describes two distinct but related phenomena observed since the late 1970s: a steady decline of about 4% per decade in the total volume of ozone in Earth s… … Wikipedia
Chlorofluorocarbon — A chlorofluorocarbon (CFC) is an organic compound that contains carbon, chlorine, and fluorine, produced as a volatile derivative of methane and ethane. A common subclass are the hydrochlorofluorocarbons (HCFCs), which contain hydrogen, as well.… … Wikipedia
Copernicium — roentgenium ← copernicium → ununtrium Hg ↑ Cn … Wikipedia