Give reason: 1. electron gain enthalpy of fluorine is less negative than that of chlorine. 2. Group 1 elements are called Alkali metals 3. First ionisation enthalpy of Nitrogen is higher than that of Oxygen

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TextTrends in Ionization Enthalpy Across Periodic TableTrends in Electron Gain Enthalpy Across Periodic TableGeneral Introduction to s-Block Elements

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The first ionization enthalpy (∆i H ) values of the third period elements, Na, Mg and Si are respectively 496, 737 and 786 kJ mol–1. Predict whether the first ∆i H value for Al will be more close to 575 or 760 kJ mol–1 ? Justify your answer.

TextTrends in Ionization Enthalpy Across Periodic Table

Which of the following will have the most negative electron gain enthalpy and which the least negative? P, S, Cl, F. Explain your answer.

TextTrends in Electron Gain Enthalpy Across Periodic Table