The first ionisation potential of Na is 5.1 eV. The value of electron gain enthalpy of Na+ will be
-2.55 eV
-5.1 eV
-10.2 eV
+2.55 eV
B.
-5.1 eV
Na → Na+ + e- (first IE)
Na+ + e- →Na
Since reaction is reverse, so electron gain enthalpy of Na+
ΔH (eg)=-5.1 eV
Gallium was named by Mendeleev as
What are magic numbers?
Which property is the basis of long form of periodic table?
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How many elements are present in:
(i) second period
(ii) fourth period
(iii) sixth period?
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In terms of electronic configuration,
what is common in a given period and group?
Mock Test Series
