- Radon-222 (222Rn, Rn-222,
historically radium emanation or radon) is the most
stable isotope of radon, with a half-life of
approximately 3.8215(2) days...
-
considered that the
radioactive emanations may
contain a new
element of the
noble gas family, and
isolated "
radium emanation" in 1909 to
determine its properties...
- most
expensive method,
because the
radium used was
irreparably lost. As with
radium emanation,
solutions of free
radium salts were also
placed in tubes;...
- (85th ed.). Boca Raton, Florida: CRC Press. ISBN 978-0-8493-0485-9.
Radium emanation = 222Rn, Ra A = 218Po, Ra B = 214Pb, Ra C = 214Bi, Ra C1 = 214Po, Ra C2...
-
originally defined as "the
quantity or m**** of
radium emanation in
equilibrium with one gram of
radium (element)", but is
currently defined as 1 Ci =...
-
small conical gl**** tube (AB)
containing "
radium emanation" (radon), "
radium A" (actual
radium), and "
radium C" (bi****h-214); its open end was sealed...
-
Curie produced hollow needles containing "
radium emanation", a colourless,
radioactive gas
given off by
radium,
later identified as radon, to be used for...
-
Radium is a
chemical element; it has
symbol Ra and
atomic number 88. It is the
sixth element in group 2 of the
periodic table, also
known as the alkaline...
-
produced up to that time. The
decay chain of 238U is
commonly called the "
radium series" (sometimes "uranium series").
Beginning with
naturally occurring...
-
Radium,
Rutherford has
proposed a new and
convenient system of nomenclature. The
first product of the
change of the
radium emanation is
named radium A...