home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
CD School House 10
/
CD School House - Education and Games (10.0) - Wayzata Technology (1995).iso
/
mac
/
DOS
/
MATH
/
TEEOTE
/
GALLIUM.ASC
< prev
next >
Wrap
Text File
|
1992-07-14
|
739b
|
19 lines
GALLIUM
Atomic symbol - Ga
Atomic weight - 69.723
Atomic number - 31
Electron configuration - 2-8-18-3
Oxidation states - +3
State of matter - solid
Heavy metal-low melting
Discovered in 1875 by Paul-Émile Lecoq de Boisbaudran
Boils at 2403 °C, melts at 29.78 °C
Notes:
Gallium liquifies just above room temperature. It is silvery white, and
soft enough to be cut with a knife. It may take on a bluish tinge due to
superficial oxidation. Gallium expands when solidified and supercools readily,
sustaining its liquid form as low as 0 °C. It can be used as a coating for
optical mirrors, as a liquid seal in strongly heated apparatus, and a
substitute for mercury in ultraviolet lamps.