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| {{पुनरीक्षण}}
| | #REDIRECT [[नियोबियम]] |
| {{Elementbox
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| |number=41
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| |symbol=Nb
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| |name=नियोबियम
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| |pronounce=
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| |left=[[जर्कोनियम]]
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| |right=[[मोलिब्डेनम]]
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| |above=[[वैनेडियम|V]]
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| |below=[[टैंटेलम|Ta]]
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| |series =[[संक्रमण धातु]]
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| |group=5
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| |period=5
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| |block=d
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| |image name= Niobium.jpg
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| |image alt=
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| |appearance=सिलेटी धातु
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| |atomic mass=92.90638
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| |electron configuration=1s<sup>2</sup> 2s<sup>2</sup> 2p<sup>6</sup> 3s<sup>2</sup> 3p<sup>6</sup> 3d<sup>10</sup> 4s<sup>2</sup> 4p<sup>6</sup> 4d<sup>4</sup> 5s<sup>1</sup>
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| |electrons per shell= 2, 8, 18, 12, 1
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| |phase= ठोस
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| |density gpcm3nrt= 8.57
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| |melting point K=2750
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| |melting point C=2477
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| |melting point F=4491
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| |boiling point K=5017
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| |boiling point C=4744
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| |boiling point F=8571
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| |heat fusion= 30
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| |heat vaporization= 689.9
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| |heat capacity= 24.60
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| |vapor pressure 1= 2942
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| |vapor pressure 10= 3207
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| |vapor pressure 100= 3524
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| |vapor pressure 1 k= 3910
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| |vapor pressure 10 k= 4393
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| |vapor pressure 100 k= 5013
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| |vapor pressure comment=
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| |crystal structure= घन शरीर केंद्रित
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| |oxidation states= '''5''', 4, 3, 2, -1<br/>(अम्लीय ऑक्साइड)
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| |electronegativity= 1.6
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| |number of ionization energies=3
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| |1st ionization energy= 652.1
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| |2nd ionization energy= 1380
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| |3rd ionization energy= 2416
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| |atomic radius= 146
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| |covalent radius= 164±6
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| |magnetic ordering= [[पराचुम्बकीय पदार्थ|पराचुम्बकीय]]
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| |electrical resistivity at 0= 152 n
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| |thermal conductivity= 53.7
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| |thermal expansion= 7.3
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| |speed of sound rod at 20= 3480
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| |Young's modulus= 105
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| |Shear modulus= 38
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| |Bulk modulus= 170
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| |Poisson ratio= 0.40
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| |Mohs hardness= 6.0
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| |Vickers hardness= 1320
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| |Brinell hardness= 736
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| |CAS number= 7440-03-1
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| |isotopes={{Elementbox_isotopes_decay | mn=91 | sym=Nb
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| | na=syn | hl=6.8×10<sup>2</sup> y
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| | dm=ε | de=- | pn=91 | ps=[[जर्कोनियम|Zr]]}}
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| {{Elementbox_isotopes_decay | mn=91m | sym=Nb
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| | na=syn | hl=60.86 d
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| | dm=IT | de=0.104e | pn=91 | ps=Nb}}
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| {{Elementbox_isotopes_decay2 | mn=92 | sym=Nb
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| | na=syn | hl=10.15 d
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| | dm1=ε | de1=- | pn1=92 | ps1=[[जर्कोनियम|Zr]]
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| | dm2=γ | de2= 0.934 | pn2= | ps2=-}}
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| {{Elementbox_isotopes_decay2 | mn=92 | sym=Nb
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| | na=syn | hl=3.47×10<sup>7</sup>y
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| | dm1=ε | de1=- | pn1=92 | ps1=[[जर्कोनियम|Zr]]
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| | dm2=γ | de2=0.561, 0.934 | pn2= | ps2=-}}
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| {{Elementbox_isotopes_stable | mn=93 | sym=Nb | na=100% | n=52}}
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| {{Elementbox_isotopes_decay | mn=93m | sym=Nb
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| | na=syn | hl=16.13 y
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| | dm=IT | de=0.031e | pn=93 | ps=Nb}}
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| {{Elementbox_isotopes_decay2 | mn=94 | sym=Nb
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| | na=syn | hl=2.03×10<sup>4</sup> y
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| | dm1=β<sup>−</sup> | de1=0.471 | pn1=94 | ps1=[[मोलिब्डेनम|Mo]]
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| | dm2=γ | de2=0.702, 0.871 | pn2= | ps2=-}}
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| {{Elementbox_isotopes_decay2 | mn=95 | sym=Nb
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| | na=syn | hl=34.991 d
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| | dm1=β<sup>−</sup> | de1=0.159 | pn1=95 | ps1=[[मोलिब्डेनम|Mo]]
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| | dm2=γ | de2=0.765 | pn2= | ps2=- }}
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| {{Elementbox_isotopes_decay | mn=95m | sym=Nb
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| | na=syn | hl=3.61 d
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| | dm=IT | de=0.235 | pn=95 | ps=Nb}}
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| |isotopes comment=
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| }}
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| '''नियोबियम''' ([[अंग्रेज़ी भाषा|अंग्रेज़ी]]:Niobium) [[आवर्त सारणी]] का [[तत्व]] है। नियोबियम का प्रतीकानुसार Nb तथा [[परमाणु संख्या]] 41 होती है। नियोबियम का [[इलेक्ट्रॉनिक विन्यास]] 1s<sup>2</sup> 2s<sup>2</sup> 2p<sup>6</sup> 3s<sup>2</sup> 3p<sup>6</sup> 3d<sup>10</sup> 4s<sup>2</sup> 4p<sup>6</sup> 4d<sup>4</sup> 5s<sup>1</sup> होता है। नियोबियम एक दुर्लभ, नरम, भूरे रंग की [[संक्रमण धातु]] है।
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| {{लेख प्रगति|आधार= |प्रारम्भिक=प्रारम्भिक1 |माध्यमिक= |पूर्णता= |शोध= }}
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| ==टीका टिप्पणी और संदर्भ==
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| <references/>
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| ==बाहरी कड़ियाँ==
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| ==संबंधित लेख==
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| {{आवर्त सारणी}}
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| [[Category:रसायन विज्ञान]]
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| [[Category:विज्ञान_कोश]]
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| [[Category:रासायनिक तत्त्व]]
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| __INDEX__
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