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प्रश्न
Give a reason for the following:
Zinc, cadmium and mercury are considered as d-block elements but not regarded as transition elements.
उत्तर
Transition metals are elements that have partially filled d-orbitals. Due to the completely filled d orbitals in their ground state and a common oxidation state of +2. Zinc, cadmium and mercury are classified as d-block elements, but not as transition elements.
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संबंधित प्रश्न
Electronic configuration of a transition element X in +3 oxidation state is [Ar]3d5. What is its atomic number?
When acidified \[\ce{K2Cr2O7}\] solution is added to \[\ce{Sn^{2+}}\] salts then \[\ce{Sn^{2+}}\] changes to ______.
The second and third rows of transition elements resemble each other much more than they resemble the first row. Explain why?
Assertion: The highest oxidation state of osmium is +8.
Reason: Osmium is a 5d-block element.
Account for the following:
In case of transition elements, ions of the same charge in a given series show progressive decrease in radius with increasing atomic number.
Match List - I with List - II.
| List - I | List - II | ||
| (a) | \[\ce{[Fe(CN)6]^3-}\] | (i) | 5.92 BM |
| (b) | \[\ce{[Fe(H2O)6]^3+}\] | (ii) | 0 BM |
| (c) | \[\ce{[Fe(CN)6]^4-}\] | (iii) | 4.90 BM |
| (d) | \[\ce{[Fe(H2O)6]^2+}\] | (iv) | 1.73 BM |
Choose the correct answer from the options given below.
Why Zn, Cd and Hg are not called transition metals?
The value of Δ0 for \[\ce{RhCl^{3-}6}\] is 243 KJ/mol which wavelength of light will promote an electron from. The colour of the complex is ______.
Which one among the following metals of the 3d series has the lowest melting point?
Give two similarities in the properties of Sc and Zn.
