Melting Point: 30
°
C (86
°
F) Boiling Point: 2,400
°
C (4,352
°
F) Density:
5.90gm/cm
3
(0.2133lb/in
3
)
What is Galliums standard state?
Name: gallium. Symbol: Ga. Atomic number: 31. Relative atomic mass (A
r
): 69.723 (1) Standard state:
solid at 298 K
(but melts only slightly above this temperature)
What is the density of germanium?
Germanium was discovered by Clemens A. Winkler at Freiberg, Germany, in 1886. Its existence had been predicted by Mendeleev who predicted its atomic weight would be about 71 and that its density
around 5.5 g/cm
3
.
What is Galliums classification?
Gallium is a chemical element with symbol Ga and atomic number 31. Classified as
a post-transition metal
, Gallium is a solid at room temperature.
What is the density of gallium and why?
| Atomic number 31 | Electronegativity according to Pauling unknown | Density 5.1 g.cm – 3 at 20°C | Melting point 29.8 °C | Boiling point 2204 °C |
|---|
Is germanium harmful to humans?
Germanium is not an essential element.
Its acute toxicity is low
. However, at least 31 reported human cases linked prolonged intake of germanium products with renal failure and even death. Signs of kidney dysfunction, kidney tubular degeneration, and germanium accumulation were observed.
Where is germanium used?
The largest use of germanium is in
the semiconductor industry
. When doped with small amounts of arsenic, gallium, indium, antimony or phosphorus, germanium is used to make transistors for use in electronic devices. Germanium is also used to create alloys and as a phosphor in fluorescent lamps.
How is gallium used today?
Gallium is a soft, silvery metal used primarily in
electronic circuits, semiconductors and light-emitting diodes (LEDs)
. It is also useful in high-temperature thermometers, barometers, pharmaceuticals and nuclear medicine tests. The element has no known biological value.
Is gallium safe to play with?
Gallium is a silvery metal and element number 31 on the Periodic Table, and it melts at 85.6 degrees Fahrenheit. That’s a temperature low enough for gallium to melt in your hand — and unlike the liquid metal mercury,
gallium is safe to play with
, according to chemists.
Is BR a bromine?
Bromine is a chemical element with symbol Br and atomic number 35. Classified as a halogen, Bromine is a liquid at room temperature.
How is density calculated?
The formula for density is
d = M/V
, where d is density, M is mass, and V is volume. Density is commonly expressed in units of grams per cubic centimetre. For example, the density of water is 1 gram per cubic centimetre, and Earth’s density is 5.51 grams per cubic centimetre.
