How many unpaired electrons are there in Nb? Niobium

[From: ] [author: ] [Date: 11-09-07] [Hit: ]

Ground state. I've gotten the answers 3 and then 1. But they're both wrong.

http://en.wikipedia.org/wiki/Niobium lists the configuration as 5s^1 4d^4 which would make 5 singles electrons.

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