मुद्रा धातु है (a) Zn
(b) Sn
(c) Pb
(d) Cu
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a)30 Zn zinc : [Ar] 3d10 4s2
b)21 Sc scandium : [Ar] 3d1 4s2
c)82 Pb lead : [Xe] 4f14 5d10 6s2 6p2
d)29 Cu copper : [Ar] 3d10 4s1
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