ଛାଞ୍ଚ:Infobox Rubidium

Rubidium,  ₃₇Rb

ସାଧାରଣ ଗୁଣ
ନାମ, ପ୍ରତୀକ	rubidium, Rb
Appearance	grey white
ଉଚ୍ଚାରଣ	/rˈbɪdiəm/ roo-BID-ee-əm
Rubidium in the periodic table
K ↑ Rb ↓ Cs krypton ← rubidium → strontium
ପରମାଣୁ କ୍ରମାଙ୍କ (Z)	37
ଶ୍ରେଣୀ, ବ୍ଳକ	group 1 (alkali metals), s-block
ପର୍ଯ୍ୟାୟ	period 5
ମୌଳିକ ପ୍ରକାର	alkali metal
ମାନକ ପରମାଣବିକ ଓଜନ (±) (Ar)	85.4678(3)
ଇଲେକ୍‌ଟ୍ରୋନ୍ ବିନ୍ୟାସ	[Kr] 5s1
per shell	2, 8, 18, 8, 1
ଭୌତିକ ଗୁଣ
ଅବସ୍ଥା	solid
ଗଳନାଙ୍କ	312.46 K ​(39.31 °C, ​102.76 °F)
ସ୍ଫୁଟନାଙ୍କ	961 K ​(688 °C, ​1270 °F)
Density near r.t.	1.532 g/cm3
when liquid, at m.p.	1.46 g/cm3
Critical point	(extrapolated) 2093 K, 16 MPa
Heat of fusion	2.19 kJ/mol
Heat of	75.77 kJ/mol
Molar heat capacity	31.060 J/(mol·K)
pressure P (Pa) 1 10 100 1 k 10 k 100 k at T (K) 434 486 552 641 769 958
Atomic properties
Oxidation states	1 (strongly basic oxide)
Electronegativity	Pauling scale: 0.82
Atomic radius	empirical: 248 pm
Covalent radius	220±9 pm
Van der Waals radius	303 pm
Miscellanea
Crystal structure	​body-centered cubic (bcc)
Speed of sound thin rod	1300 m/s (at 20 °C)
Thermal conductivity	58.2 W/(m·K)
Electrical resistivity	128 n Ω·m (at 20 °C)
Magnetic ordering	paramagnetic
Young's modulus	2.4 GPa
Bulk modulus	2.5 GPa
Mohs hardness	0.3
Brinell hardness	0.216 MPa
CAS Number	7440-17-7
ଇତିହାସ
ଆବିଷ୍କାର	Robert Bunsen and Gustav Kirchhoff (1861)
First isolation	George de Hevesy
Most stable isotopes of rubidium
iso NA half-life DM DE (MeV) DP 83Rb syn 86.2 d ε - 83Kr γ 0.52, 0.53, 0.55 - 84Rb syn 32.9 d ε - 84Kr β+ 1.66, 0.78 84Kr γ 0.881 - β− 0.892 84Sr 85Rb 72.168% 85Rb is stable with 48 neutrons 86Rb syn 18.65 d β− 1.775 86Sr γ 1.0767 - 87Rb 27.835% 4.88 × 10୧୦ y β− 0.283 87Sr

References

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