Chemical Elements.com - Niobium (Nb)

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Basic Information

Name: Niobium
Symbol: Nb
Atomic Number: 41
Atomic Mass: 92.90638 amu
Melting Point: 2468.0 °C (2741.15 K, 4474.4 °F)
Boiling Point: 4927.0 °C (5200.15 K, 8900.6 °F)
Number of Protons/Electrons: 41
Number of Neutrons: 52
Classification: Transition Metal
Crystal Structure: Cubic
Density @ 293 K: 8.57 g/cm³
Color: white

Atomic Structure

Number of Energy Levels: 5

First Energy Level:

Second Energy Level:

Third Energy Level:

Fourth Energy Level:

Fifth Energy Level:

Isotopes

Isotope	Half Life
Nb-90	14.6 hours
Nb-91	700.0 years
Nb-91m	62.0 days
Nb-92	3.6E7 years
Nb-92m	10.13 days
Nb-93	Stable
Nb-93m	16.1 years
Nb-94	20000.0 years
Nb-94m	6.26 minutes
Nb-95	34.97 days
Nb-95m	3.61 days
Nb-96	23.4 hours
Nb-97	1.23 hours
Nb-97m	58.1 seconds

Facts

Date of Discovery: 1801
Discoverer: Charles Hatchet
Name Origin: After Niobe, daughter of mythical king (Tantalus)
Uses: No uses known
Obtained From: columbite

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