Nb - Niobium

A transition metal, discovered by Hatchett in 1801 in London. Niobium was formerly known as columbium.

Atomic number - 41 Density g/mL 8 .55

Atomic weight u 92 .9064 Melting point K 2740

Bonding radius A 1 .34 Boiling point K 5017

Atomic radius A 2 .08 Heat of vaporization kJ/mol 682

Ionization Potential V 6 .88 Heat of fusion kJ/mol 26 .4

Electronegativity - 1 .6 Specific heat J/gK 0 .26

The oxide is mildly acidic.
Crystal are body centered cubic.

Electron config. : [Kr] 4d⁴ 5s¹

Isotopes of Nb: Click mass number for decay process, product for element page.

083 4.1 sec EC,7.500 MeV Zr-83 82.936660	084 12 sec EC/ECp,9.600 Zr-84/Y-83 83.933547	085 20.9 sec EC,6.000 MeV Zr-85 84.927911	086 88 sec EC,7.980 MeV Zr-86 85.925034	087 2.6 min EC,5.170 MeV Zr-87 86.920364	088 14.5 min EC,7.200 MeV Zr-88 87.917949	089 1.18 hr EC,4.290 MeV Zr-89 88.913493
090 14.60 hr EC,6.111 MeV Zr-90 89.911263	091 6.8E+2 yr EC,1.253 MeV Zr-91 90.906989	092 3.47E+7 yr B-/EC,2.006 Mo-92/Zr-92 91.907192	093 100% Stable 92.906377	094 2.03E+4 yr B-,2.045 MeV Mo-94 93.907282	095 34.975 da B-,1.125 MeV Mo-95 94.906835	096 23.35 hr B-,3.187 MeV Mo-96 95.908099
097 72.1 min B-,1.934 MeV Mo-97 96.908096	098 2.86 sec B-,4.586 MeV Mo-98 97.910330	099 15.0 sec B-,3.639 MeV Mo-99 98.911617	100 1.5 sec B-,6.250 MeV Mo-100 99.914180	101 7.1 sec B-,4.569 MeV Mo-101 100.91525	102 1.3 sec B-,7.210 MeV Mo-102 101.91803	103 1.5 sec B-,5.530 MeV Mo-103 102.91914
104 4.8 sec B-/B-n,8.110 Mo-104/Mo-103 103.92245	105 2.95 sec B-,6.490 MeV Mo-105 104.92392	106 1.02 sec B-,9.300 MeV Mo-106 105.92807	107 330 msec B-,7.900 MeV Mo-107 106.93021	109 0.06 sec B-,9.100 MeV Mo-109 108.93762	MASS abund. Halflife Particle, Energy Decay Product(s) Isotopic Mass

Atomic number	-	41		Density	g/mL	8	.55
Atomic weight	u	92	.9064	Melting point	K	2740
Bonding radius	A	1	.34	Boiling point	K	5017
Atomic radius	A	2	.08	Heat of vaporization	kJ/mol	682
Ionization Potential	V	6	.88	Heat of fusion	kJ/mol	26	.4
Electronegativity	-	1	.6	Specific heat	J/gK	0	.26
The oxide is mildly acidic.				Crystal are body centered cubic.
Electron config. : [Kr] 4d⁴ 5s¹