-
Francium is a
chemical element; it has
symbol Fr and
atomic number 87. It is
extremely radioactive; its most
stable isotope,
francium-223 (originally...
- Ununennium, also
known as eka-
francium or
element 119, is a
hypothetical chemical element; it has
symbol Uue and
atomic number 119.
Ununennium and Uue...
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Francium (87Fr) has no
stable isotopes. A
standard atomic weight cannot be given. Its most
stable isotope is 223Fr with a half-life of 22 minutes, occurring...
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Francium hydroxide is a
hypothetical inorganic compound with a
chemical formula FrOH. It is a
hydroxide of
francium. It
probably can be
produced by reacting...
-
Francium compounds are
compounds containing the
element francium (Fr). Due to
francium being very unstable, its
salts are only
known to a
small extent...
- however, no
refinements have been made for
francium as no
experiment has been conducted. However,
francium is
expected and, to a
small extent, observed...
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lithium (Li),
sodium (Na), pot****ium (K),
rubidium (Rb),
caesium (Cs), and
francium (Fr).
Together with
hydrogen they
constitute group 1,
which lies in the...
- (number) one of the
years 87 BC, AD 87, 1987, 2087, etc.
Atomic number 87,
francium Intel 8087, a floating-point
coprocessor 87;
Common gasoline rating 87...
-
physicist and a
student of
Marie Curie. In 1939,
Perey discovered the
element francium by
purifying samples of
lanthanum that
contained actinium. In 1962, she...
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Francium chloride is a
radioactive chemical compound with the
formula FrCl. It is a salt
predicted to be a
white solid and is
soluble in water. Its properties...
