ଛାଞ୍ଚ:Infobox beryllium

Beryllium,  ₄Be

ସାଧାରଣ ଗୁଣ
ନାମ, ପ୍ରତୀକ	beryllium, Be
Appearance	white-gray metallic
ଉଚ୍ଚାରଣ	/bəˈrɪliəm/ bə-RIL-ee-əm
Beryllium in the periodic table
- ↑ Be ↓ Mg lithium ← beryllium → boron
ପରମାଣୁ କ୍ରମାଙ୍କ (Z)	4
ଶ୍ରେଣୀ, ବ୍ଳକ	group 2 (alkaline earth metals), s-block
ପର୍ଯ୍ୟାୟ	period 2
ମୌଳିକ ପ୍ରକାର	alkaline earth metal
ମାନକ ପରମାଣବିକ ଓଜନ (±) (Ar)	9.012182(3)
ଇଲେକ୍‌ଟ୍ରୋନ୍ ବିନ୍ୟାସ	[He] 2s2
per shell	2, 2
ଭୌତିକ ଗୁଣ
ଅବସ୍ଥା	solid
ଗଳନାଙ୍କ	1560 K ​(1287 °C, ​2349 °F)
ସ୍ଫୁଟନାଙ୍କ	2742 K ​(2469 °C, ​4476 °F)
Density near r.t.	1.85 g/cm3
when liquid, at m.p.	1.690 g/cm3
Heat of fusion	12.2 kJ/mol
Heat of	297 kJ/mol
Molar heat capacity	16.443 J/(mol·K)
pressure P (Pa) 1 10 100 1 k 10 k 100 k at T (K) 1462 1608 1791 2023 2327 2742
Atomic properties
Oxidation states	2, 1 ​amphoteric oxide
Electronegativity	Pauling scale: 1.57
energies	(more)
Atomic radius	empirical: 112 pm
Covalent radius	96±3 pm
Van der Waals radius	153 pm
Miscellanea
Crystal structure	​hexagonal close-packed (hcp)
Speed of sound thin rod	12870 m/s (at r.t.)
Thermal expansion	11.3 µm/(m·K) (at 25 °C)
Thermal conductivity	200 W/(m·K)
Electrical resistivity	36 n Ω·m (at 20 °C)
Magnetic ordering	diamagnetic
Young's modulus	287 GPa
Shear modulus	132 GPa
Bulk modulus	130 GPa
Poisson ratio	0.032
Mohs hardness	5.5
Vickers hardness	1670 MPa
Brinell hardness	600 MPa
CAS Number	7440-41-7
ଇତିହାସ
ଆବିଷ୍କାର	Louis Nicolas Vauquelin (1797)
First isolation	Friedrich Wöhler & Antoine Bussy (1828)
Most stable isotopes of beryllium
iso NA half-life DM DE (MeV) DP 7Be trace 53.12 d ε 0.862 7Li γ 0.477 - 9Be 100% 9Be is stable with 5 neutrons 10Be trace 1.36×106 y β− 0.556 10B

References

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