Beryllium
4
Be
Gruppe
2
Periode
2
Blokk
s
Protoner
Elektroner
Nøytroner
4
4
5
Generelle egenskaper
Atomnummer
4
Atomvekt
9,012182
Massetall
9
Kategori
Jordalkalimetaller
Farge
Skifergrå
Radioaktiv
Nei
From the Greek word beryllos, beryl
Krystallstruktur
Simple Hexagonal
Historie
Louis-Nicolas Vauquelin discovered beryllium in the oxide form in both beryl and emeralds in 1798.
Friedrich Wöhler and Antoine Bussy independently isolated beryllium in 1828 by the chemical reaction of metallic potassium with beryllium chloride.
The first commercially-successful process for producing beryllium was developed in 1932 by Alfred Stock and Hans Goldschmidt.
Friedrich Wöhler and Antoine Bussy independently isolated beryllium in 1828 by the chemical reaction of metallic potassium with beryllium chloride.
The first commercially-successful process for producing beryllium was developed in 1932 by Alfred Stock and Hans Goldschmidt.
Elektroner per energinivå
2, 2
Elektronkonfigurasjon
[He] 2s2
Emerald is a naturally occurring compound of beryllium
Fysikalske egenskaper
Fase
Fast stoff
Tetthet
1,85 g/cm3
Smeltepunkt
1560,15 K | 1287 °C | 2348,6 °F
Kokepunkt
2742,15 K | 2469 °C | 4476,2 °F
Smeltevarme
7,95 kJ/mol
Fordampningsvarme
297 kJ/mol
Spesifikk varmekapasitet
1,825 J/g·K
Forekomst i jordskorpa
0,00019%
Forekomst i universet
1×10-7%
CAS Number
7440-41-7
PubChem CID Number
5460467
Atomegenskaper
Atomradius
112 pm
Kovalent radius
96 pm
Elektronegativitet
1,57 (Pauling-skalaen)
Ioniseringsenergi
9,3227 eV
Molart volum
4,9 cm3/mol
Termisk ledningsevne
2,01 W/cm·K
Oksidasjonstilstander
1, 2
Bruksområder
Beryllium is used in nuclear reactors as a reflector or moderator.
Beryllium metal is used for lightweight structural components in the defense and aerospace industries in high-speed aircraft, guided missiles, space vehicles and satellites.
Unlike most metals, beryllium is virtually transparent to x-rays and hence it is used in radiation windows for x-ray tubes.
Beryllium metal is used for lightweight structural components in the defense and aerospace industries in high-speed aircraft, guided missiles, space vehicles and satellites.
Unlike most metals, beryllium is virtually transparent to x-rays and hence it is used in radiation windows for x-ray tubes.
Beryllium and its salts are toxic and should be handled with the greatest of care
Isotoper
Stabile isotoper
9BeUstabile isotoper
5Be, 6Be, 7Be, 8Be, 10Be, 11Be, 12Be, 13Be, 14Be, 15Be, 16Be