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Get Answers to all your Questions
- #Class 12
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- #Chemistry
- #Classification of Elements and Periodic table
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Which of the following statements is incorrect?
Transition elements exhibit higher enthalpies of atomization as they have stonger interatomic interaction.
.
compounds are more stable than
where as
compounds are more stable than
.
The elements which give the greatest number of oxidation states do not occur in or near the middle of
the series.
Answers (1)
Periodicity of atomic radius and ionic radius in period -
In a period from left to right the effective nuclear charge increases because the next electron fills in the same shell. So the atomic size decrease.
- wherein
Variation of electron gain enthalpy with size of atom -
In general, the electron gain enthalpy value decreases (less negative) with increasing atomic radius.
- wherein
(A) In is in
oxidation state. The electronic configuration is ,
and thus it has five unpaired electrons.
(B) one unpaired electrons.
(C) , four unpaired electrons.
(D) , two unpaired electrons.
Hence has highest number of unpaired electrons and has highest degree of paramagnetism.
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