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sltmac: ½ð±Ò+1 2012-09-10 08:22:22
Öª¸üÄñserena: ½ð±Ò+15, ·­ÒëEPI+1, ¡ï¡ï¡ïºÜÓаïÖú 2012-09-10 11:23:35
Niobium is one element in VB group,whose electron configuration
is 4d45s1 and Common valence state is +5.It is easily becoming the NbO6 in  octahedron which is connected by different conjunct
angles and boundaries when(it is) hexa-coordinate.
2Â¥2012-09-09 19:06:55
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