Explain why Halogens have very high negative electron gain enthalpy?

Explain why Halogens have very high negative electron gain enthalpy?
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Ans.The electron gain enthalpy for halogens is highly negative because they can acquire the nearest stable noble gas configuration by accepting an extra electron.
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Halogens have maximum negative electron gain enthalpy in the respective periods in the P. T Why ?

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Last Answer : Ans Due to smallest size and high effective nuclear charge , readily accept one electron  to acquire noble gas electronic configuration  

From the elements: Cl, Br, F, O, Al, C, Li, Cs and Xe; choose the following: (a) The element with highest negative electron gain enthalpy. (b) The element with lowest ionization enthalpy. (c) The element with smallest ionic radius. (d) The element with six electrons in the valence shell. (e) The element which is a liquid at room temperature. (f)The element which belongs to zero group. (g) The elements which forms largest number of compounds.

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Last Answer : Ans. (a). The element chlorine (Cl) has the highest negative electron gain enthalpy. (b). The element cesium (Cs) has lowest ionization enthalpy. (c). The element fluorine F has lowest atomic radius. (d ... zero group (or group 18). (g). The element carbon (C) forms the largest number of compounds.

Arrange the following order of the property indicated: (a). F, Cl, Br and I (negative electron gain enthalpy) (b). Mg, Al, Si and Na (ionization enthalpy) (c). C, N, O and F (second ionization enthalpy)

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Last Answer : Ans. (a). I

Would you expect the second electron gain enthalpy of O as positive, more negative or less negative than the first? Justify your answer.

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Which out of F or Cl has a more negative electron gain enthalpy?

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Explain why Electron gain enthalpy of noble gases is positive.

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Explain :  Electronegativity and electron gain enthalpy. Which of the two can be measured experimentally?

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Which group elements show very low ionization enthalpy in the periodic table?

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Which halogen's zeron number is not variable ?

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The most reactive among the halogens is - (1) Fluorine (2) Chlorine (3) Bromine (4) Iodine

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