General Chemistry
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Rank the following transition metals in order of increasing atomic radius.
(a) Tc (b) Ru (c) Mo (d) Nb
Provide an explanation for the observed trend.
Ru < Tc < Mo < Nb
The observed trend of decreasing atomic radii from left to right across the period is caused by the increasing nuclear charge from left to right across the period.
Nb < Mo < Tc < Ru
The observed trend of increasing atomic radii from left to right across the period is caused by the decreasing nuclear charge from left to right across the period.