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Protactinium is a
chemical element; it has
symbol Pa and
atomic number 91. It is a dense, radioactive, silvery-gray
actinide metal which readily reacts...
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Protactinium (91Pa) has no
stable isotopes. The four
naturally occurring isotopes allow a
standard atomic weight to be given. Twenty-nine radioisotopes...
- of
protactinium. 233Pa has
convenient half-life and
energy of γ-radiation, and thus was used in most
studies of
protactinium chemistry.
Protactinium-233...
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Protactinium oxide may
refer to:
Protactinium(II) oxide [Wikidata], PaO
Protactinium(IV) oxide, PaO2
Protactinium(V) oxide, Pa2O5
Protactinium#Chemical...
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Protactinium bromide may
refer to:
Protactinium(IV)
bromide (
protactinium tetrabromide), PaBr4
Protactinium(V)
bromide (
protactinium pentabromide), PaBr5...
- 13-minute
isotope was a
protactinium isotope or not. It was a
logical decision,
having been the
discoverers of
protactinium."
Between 1934 and 1938,...
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found was an
isotope of
protactinium. This
spurred Hahn and Meitner, the
discoverers of the most
stable isotope of
protactinium, to
conduct a four-year-long...
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Meitner discovered isotopes of the
radioactive elements radium, thorium,
protactinium and uranium. He also
discovered the
phenomena of
atomic recoil and nuclear...
- half-life of only 22 minutes. Thorium-233
decays into
protactinium-233
through beta decay.
Protactinium-233 has a half-life of 27 days and beta
decays into...
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Protactinium tetraiodide is a
binary inorganic compound of
protactinium metal and
iodine with the
chemical formula PaI4.
Protactinium tetraiodide can...
