The element-hydrogen (E-H, i.e. O-H etc) bond enthalpy down the group 16 is: (select all correct answers; wrong answers,

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The Element Hydrogen E H I E O H Etc Bond Enthalpy Down The Group 16 Is Select All Correct Answers Wrong Answers 1 (75.08 KiB) Viewed 41 times

The element-hydrogen (E-H, i.e. O-H etc) bond enthalpy down the group 16 is: (select all correct answers; wrong answers, if selected, will attract penalty) Select one or more: Oa. Decreasing due to poorer orbital overlap between H and progressively larger, more diffuse orbitals of the elements as the group is descended; O b. Increasing due to better orbital overlap between H and progressively larger, more diffuse orbitals of the elements as the group is descended; c. Decreasing due to increasing electronegativity difference between elements and H (electronegativity of H=2.20) as the group is descended; d. Decreasing, the electronegativity of Group 16 elements decreases as the group is descended leading to progressively smaller contributions due to partial ionic character of the bond. Elements in Periods 5 and 6 have particularly small difference in electronegativities with H; e. Increasing due to increasing electronegativity difference between elements and H (electronegativity of H=2.20) as the group is descended; Of. Decreasing due to better orbital overlap between H and progressively larger, more diffuse orbitals of the elements as the group is descended;