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प्रश्न
Account for the following:
Zn, Cd and Hg are soft metals.
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उत्तर
Zn, Cd and Hg are soft metals due to absence of any unpaired electrons resulting weak metal-metal bonding.
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संबंधित प्रश्न
Compare the chemistry of actinoids with that of the lanthanoids with special reference to oxidation state.
Write the different oxidation states of iron
What is lanthanoid contraction? Write the.............
Gadolinium belongs to 4f series. It’s atomic number is 64. Which of the following is the correct electronic configuration of gadolinium?
Although +3 is the characteristic oxidation state for lanthanoids but cerium also shows +4 oxidation state because:
(i) it has variable ionisation enthalpy
(ii) it has a tendency to attain noble gas configuration
(iii) it has a tendency to attain f 0 configuration
(iv) it resembles Pb4+
Although +3 oxidation states is the characteristic oxidation state of lanthanoids but cerium shows +4 oxidation state also. Why?
Zr (Z = 40) and Hf (Z = 72) have similar atomic and ionic radii because of ______.
Cerium (Z = S8) is an important member of lanthanoids. Which of the following statements about cerium is incorrect?
State a reason for the following:
La(OH)3 is more basic than Lu(OH)3.
Why is Mn2+ ion more stable than Fe2+ ion?
(Atomic numbers of Mn = 25 and Fe = 26)
