Home
Class 12
CHEMISTRY
Why do halogens have high electron gain ...

Why do halogens have high electron gain enthalpies (i.e. `-Delta_(eg)H^(o.))`?

Text Solution

Verified by Experts

The valence sheel electronic configuration of halogens is `ns^(2)np^(5)` and thus they require one electron to acquire the stable noble gas configuration `ns^(2)np^(5)`. Because of this they have strong tendency to accept an additional electron and hence have high electron gain enthalpies.
Promotional Banner

Topper's Solved these Questions

  • PERIODIC TABLE & PERIODICITY

    RESONANCE|Exercise MISCELLANEOUS SOLVED PROBLEMS|7 Videos

  • PERIODIC TABLE & PERIODICITY

    RESONANCE|Exercise Board Level Exercise|31 Videos

  • PERIODIC TABLE & PERIODICITY

    RESONANCE|Exercise Advanced Level Problems|107 Videos

  • P-BLOCK ELEMENTS (HALOGEN & NOBLE GASES)

    RESONANCE|Exercise APSP PART-3|22 Videos

  • QUALITATIVE ANALYSIS

    RESONANCE|Exercise INORGANIC CHMISTRY(Qualitative analysis)|35 Videos

Similar Questions

Explore conceptually related problems

Why do halogens have low melting points ?

Why do halogens have maximum negative electron gain enthalpy in the respective periods of the periodic table?

Answer the following question (Based on EA, Delta_(eg)H^(ɵ) and IE ). (a) IE_(1) of Li is 5.4 eV "atom"^(-1) and the EA of Cl is 3.6 eV "atom"^(-1) . Calculate Delta_( r)H^(ɵ) in "kcal mol"^(-1) and kJ mol^(-1) for the reaction Li_((g))+Cl_((g)) rarr Li_((g))^(o+)+Cl_((g))^(ɵ) formed at such a low pressure that resulting ions do not combine with each other. (b) The IE of atoms X and Y are 400 and 300 kcal mol^(-1) respectively. EA's of these atoms are 80.0 and 85.0 K cal mol^(-1) . Explain as which of the atoms has higher EN . ( c) Explain why EA of S is -200 kJ mol^(-1) but the second EA is +649 kJ mol^(-1) ? (d) Which of the following pairs of elements would have more negative electron gain enthalpy (Delta_("eg")H^(ɵ)) ? (i) F or Cl , (ii) O or F (e) What would be the second electron gain enthalpy (Delta_(eg)H_(2)^(ɵ)) of oxygen as positive, more negative or less negative than first (Delta_(eg)H_(1)^(ɵ)) ? Explain. (f) Which has less negative Delta_(eg)H^(ɵ) oxygen or sulphur?

The conservation of gaseous atoms K and F to K^(o+) and F^(ɵ) absorbs 0.85 eV of energy. If the IE and Delta_("eg")H^(ɵ) of K and F have magnitudes in the ratio of 7:6 , what is the electron gain enthalpy (Delta_("eg")H^(ɵ)) of fluorine ?

Alkali metal halides have high negative enthalpies of formation. The Delta_(f)H^(@) values for _____ become less negative as we go down the group.

Which out of the N or O has higher electron gain enthalpy?

Noble gase have zero electron gain enthalpy values. Explain.

Why fluorine has lesser electron gain enthalpy than chlorine?