browse words by letter
a
b
c
d
e
f
g
h
i
j
k
l
m
n
o
p
q
r
s
t
u
v
w
x
y
z
more about gallium
gallium |
5 definitions found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Gallium \Gal"li*um\, n. [NL.; perh. fr L. Gallia France.] (Chem.) A rare metallic element, found combined in certain zinc ores. It is white, hard, and malleable, resembling aluminium, and remarkable for its low melting point (86[deg] F., 30[deg] C.). Symbol, Ga at wt., 69.9. Gallium is chiefly trivalent, resembling aluminium and indium. It was predicted with most of its properties, under the name eka-aluminium, by Mendelyeev on the basis of the periodic law. This prediction was verified in its discovery (in 1875) by its characteristic spectrum (two violet lines). From Webster's Revised Unabridged Dictionary (1913) [web1913]: Ekaluminium \Ek*al`u*min"i*um\, n. [Skr. [=e]ka one + E. aluminium.] (Chem.) The name given to a hypothetical element, -- later discovered and called {gallium}. See {Gallium}, and cf {Ekabor}. From Webster's Revised Unabridged Dictionary (1913) [web1913]: Gallium \Gal"li*um\, n. [NL., fr L. Gallia France.] (Chem.) A rare metallic element, found in certain zinc ores. It is white, hard, and malleable, resembling aluminium, and remarcable for its low melting point (86? F., 30?C). Symbol Ga Atomic weight 69.9. Note: The element was predicted with most of its properties, under the name ekaluminium, by the Russian chemist Mendelejeff on the basis of the Periodic law. This prediction was verified in its discovery by the French chemist Lecoq de Boisbaudran by its characteristic spectrum (two violet lines), in an examination of a zinc blende from the Pyrenees. From WordNet r 1.6 [wn]: gallium n : a rare silvery (usually trivalent) metallic element; brittle at low temperatures but liquid above room temperature; occurs in trace amounts in bauxite and zinc ores [syn: {Ga}, {atomic number 31}] From Elements database 20001107 [elements]: gallium Symbol: Ga Atomic number: 31 Atomic weight: 69.72 Soft silvery metallic element, belongs to group 13 of the periodic table. The two stable isotopes are Ga-69 and Ga-71. Eight radioactive isotopes are known all having short half-lives. Gallium Arsenide is used as a semiconductor. Corrodes most other metals by diffusing into their lattice. First identified by Francois Lecoq de Boisbaudran in 1875.
more about gallium
This work is licensed under a
