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Niobium, formerly columbium, is a chemical element with the symbol Nb and atomic number 41. It is a soft, grey, ductile transition metal, which is often found in the pyrochlore mineral, the main commercial source for niobium, and columbite. Wikipedia
Symbol: Nb
Electron configuration: Kr 4d4
Atomic number: 41
Melting point: 2,469 °C
Atomic Mass: 92.90638 ± 0.00002 u
Discoverer: Charles Hatchett
Source: Google
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Nb or niobium has the electron configuration of [Kr]4d45s1
What is electronic configuration of Nb plus 4?
The electronic configuration of niobium (Nb) in its neutral state is ( [Kr] 4d^4 5s^1 ). When niobium loses four electrons to become Nb(^{4+}), the configuration changes to ( [Kr] 4d^4 ), as the 5s and three of the 4d electrons are removed. Thus, the electronic configuration for Nb(^{4+}) is ( [Kr] 4d^4 ).
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4 Ground state configuration is 5s^1 4^4
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