WebElectron gain enthalpy becomes less negative on moving down a group due to increase in atomic size. However, the electron gain enthalpy of F is less negative than that of CI due to electron-electron repulsion in small-sized F atom. Thus, the correct order is FBr>I. Web18. Which of the following statements are correct? (1) Helium has the highest first ionisation enthalpy in the periodic table (ii) Chlorine has less negative electron gain enthalpy than fluorine. (iii) Mercury and bromine are liquids at room temperature. (iv) In any period, atomic radius of alkali metal is the highest.
What is Electron Affinity? - Definition, Trends
WebApr 9, 2024 · The electron affinity of the elements depends on various factors such as size of the atom, electron gain enthalpy of the atom as well as the position in the periodic table. In the periodic table Oxygen, Sulphur and selenium all are present in the same group in the order Oxygen, Sulphur, selenium. WebHalogens have the highest negative value of electron gain enthalpy. Here Cl and F both are halogens but electron gain enthalpy of Cl is more negative than F because of the very small size of F which causes interelectronic repulsion among its electrons. infant morning stuffy nose
Within each pair of elementsF&Cl, S&SeandLi&Na, respectively
WebElectron gain enthalpy is the amount of energy released when an electron is added to an isolated gaseous atom. The unit of electron gain enthalpy is KJ/ mol or KJ per Mole. The electron gain enthalpy of an element depends on the nuclear charge, atomic radius and electronic configuration. WebThe electron gain enthalpy of F is less negative than of Cl because of its small size. The additional e ⊖ in case of "F" will be added to "2p" orbital while in case of "Cl" it will go in the "3p" orbital. As a 2p orbital occupies smaller region of space than 3p orbital, it will be more compact because of e ⊖−e ⊖ repulsive would be more. WebDec 19, 2016 · According to this ChemistryLibretexts website and this StackExchange answer, 1st electron affinites are negative and 2nd electron affinities are positive. … infant mortality 1900 uk