Periodic properties of d-block elements
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CHXII08:THE D- & F-BLOCK ELEMENTS

321601 Although \(\mathrm{\mathrm{Zr}}\) belongs to \({\rm{4d}}\) and \(\mathrm{\mathrm{Hf}}\) belongs to \({\rm{5d}}\) transition series but it is quite difficult to separate them. Why ?

1 Due to almost same size
2 Due to Lanthanide contraction
3 Belong to same group
4 Both (1) & (2)
CHXII08:THE D- & F-BLOCK ELEMENTS

321602 Metallic radii of some transition elements are given below. Which of these elements will have the highest density?
\[\begin{array}{*{20}{c}}
{{\rm{Element}}}&{{\rm{Fe}}}&{{\rm{Co}}}&{{\rm{Ni}}}&{{\rm{Cu}}}\\{{\rm{Metallic}}\,\,{\rm{radii}}\,\,{\rm{(pm)}}}&{{\rm{126}}}&{{\rm{125}}}&{{\rm{125}}}&{{\rm{128}}}\end{array}\]

1 \(\mathrm{\mathrm{Fe}}\)
2 \(\mathrm{\mathrm{Ni}}\)
3 \(\mathrm{\mathrm{Co}}\)
4 \(\mathrm{\mathrm{Cu}}\)
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CHXII08:THE D- & F-BLOCK ELEMENTS

321601 Although \(\mathrm{\mathrm{Zr}}\) belongs to \({\rm{4d}}\) and \(\mathrm{\mathrm{Hf}}\) belongs to \({\rm{5d}}\) transition series but it is quite difficult to separate them. Why ?

1 Due to almost same size
2 Due to Lanthanide contraction
3 Belong to same group
4 Both (1) & (2)
CHXII08:THE D- & F-BLOCK ELEMENTS

321602 Metallic radii of some transition elements are given below. Which of these elements will have the highest density?
\[\begin{array}{*{20}{c}}
{{\rm{Element}}}&{{\rm{Fe}}}&{{\rm{Co}}}&{{\rm{Ni}}}&{{\rm{Cu}}}\\{{\rm{Metallic}}\,\,{\rm{radii}}\,\,{\rm{(pm)}}}&{{\rm{126}}}&{{\rm{125}}}&{{\rm{125}}}&{{\rm{128}}}\end{array}\]

1 \(\mathrm{\mathrm{Fe}}\)
2 \(\mathrm{\mathrm{Ni}}\)
3 \(\mathrm{\mathrm{Co}}\)
4 \(\mathrm{\mathrm{Cu}}\)
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