ଛାଞ୍ଚ:Infobox tellurium

Tellurium,  ₅₂Te

ସାଧାରଣ ଗୁଣ
ନାମ, ପ୍ରତୀକ	tellurium, Te
Appearance	silvery lustrous gray
ଉଚ୍ଚାରଣ	/tˈlʊəriəm/ te-LEWR-ee-əm
Tellurium in the periodic table
Se ↑ Te ↓ Po antimony ← tellurium → iodine
ପରମାଣୁ କ୍ରମାଙ୍କ (Z)	52
ଶ୍ରେଣୀ, ବ୍ଳକ	group 16 (chalcogens), p-block
ପର୍ଯ୍ୟାୟ	period 5
ମୌଳିକ ପ୍ରକାର	metalloid
ମାନକ ପରମାଣବିକ ଓଜନ (Ar)	127.60
ଇଲେକ୍‌ଟ୍ରୋନ୍ ବିନ୍ୟାସ	[Kr] 4d10 5s2 5p4
per shell	2, 8, 18, 18, 6
ଭୌତିକ ଗୁଣ
ଅବସ୍ଥା	solid
ଗଳନାଙ୍କ	722.66 K ​(449.51 °C, ​841.12 °F)
ସ୍ଫୁଟନାଙ୍କ	1261 K ​(988 °C, ​1810 °F)
Density near r.t.	6.24 g/cm3
when liquid, at m.p.	5.70 g/cm3
Heat of fusion	17.49 kJ/mol
Heat of	114.1 kJ/mol
Molar heat capacity	25.73 J/(mol·K)
pressure P (Pa) 1 10 100 1 k 10 k 100 k at T (K)     (775) (888) 1042 1266
Atomic properties
Oxidation states	6, 5, 4, 2, -2 (mildly acidic oxide)
Electronegativity	Pauling scale: 2.1
Atomic radius	empirical: 140 pm
Covalent radius	138±4 pm
Van der Waals radius	206 pm
Miscellanea
Crystal structure	​hexagonal
Speed of sound thin rod	2610 m/s (at 20 °C)
Thermal conductivity	(1.97–3.38) W/(m·K)
Magnetic ordering	diamagnetic
Young's modulus	43 GPa
Shear modulus	16 GPa
Bulk modulus	65 GPa
Mohs hardness	2.25
Brinell hardness	180 MPa
CAS Number	13494-80-9
ଇତିହାସ
ଆବିଷ୍କାର	Franz-Joseph Müller von Reichenstein (1782)
First isolation	Martin Heinrich Klaproth
Most stable isotopes of tellurium
iso NA half-life DM DE (MeV) DP 120Te 0.09% >2.2×1016 y β+β+ 1.701 120Sn 121Te syn 16.78 d ε 1.040 121Sb 122Te 2.55% 122Te is stable with 70 neutrons 123Te 0.89% >6×1013 y ε 0.051 123Sb 124Te 4.74% 124Te is stable with 72 neutrons 125Te 7.07% 125Te is stable with 73 neutrons 126Te 18.84% 126Te is stable with 74 neutrons 127Te syn 9.35 h β− 0.698 127I 128Te 31.74% 2.2×1024 y β−β− 0.867 128Xe 129Te syn 69.6 min β− 1.498 129I 130Te 34.08% 7.9×1020 y β−β− 2.528 130Xe

References

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