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PART - 1 CH - 3 Classification of Elements and Periodicity in Properties — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryPART - 1 CH - 3 Classification of Elements and Periodicity in Properties2 Marks
Question
(i) From $B$ to $F$ in the second period and in third period from Al to Cl in increasing order of electron gain enthalpy.
(ii) Arrange elements of halogen family in decreasing order of electron gain enthalpy.
✓

Answer

(i) In second period the arrangement electron gain enthalpy of B to F is as : $N < B < C < O < F$.
In third period the sequence of electron gain enthalpy from Al to Cl : $Al < P < Si < S < Cl$.
(ii) The order of electron gain enthalpy of elements of halogen family: $Cl > F > Br > I$.

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