Electron Configuration

[Kr] 5s2 4d3

Another exception: [Kr] 5s1 4d4

Niobium is named for "Niobe"
Melting Point: 2466.85 oC
Boiling Point: 4743.85 oC
Heat of Vaporization: 7321.24 J/g
Heat of Fusion: 292.77 J/g
Specific Heat Capacity: 0.265 J/g . Co or 0.06 cal/g . Co
Density: 8.55 g/cm3