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प्रश्न
Explain the observation, at the end of each period, there is a slight increase in the atomic radius of d-block elements.
उत्तर
The d-orbital is full with ten electrons and shields the electrons present in the higher s-orbital to a greater extent resulting in an increase in size.
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संबंधित प्रश्न
Explain giving reason:
Transition metals and many of their compounds show paramagnetic behaviour.
Write down the electronic configuration of Co2+.
Write down the electronic configuration of Th4+.
Account for the following:
Mn2+ is more stable than Fe2+ towards oxidation to +3 state.
Name the elements of 3d transition series that show maximum number of oxidation states. Why does this happen?
Out of Cr3+ and Mn3+, which is a stronger oxidising agent and why?
Which among the following is not considered as a part of transition elements?
The electronic configuration of \[\ce{Cu(II)}\] is 3d9 whereas that of \[\ce{Cu(I)}\] is 3d10. Which of the following is correct?
Give reason for the following statements:
Scandium (Z = 21) is a transition element but Zn (Z = 30) is not.
Match the properties with the elements of 3d series:
| (i) | lowest enthalpy of atomisation | (p) | Sc |
| (ii) | shows maximum number of oxidation states | (q) | Mn |
| (iii) | transition metal that does not form coloured compounds |
(r) | Zn |
| (s) | Ti |
