Question

1) Formation of a cation is called endothermic whereas formation of anion is called ectothermic.why?

2)Why do Chlorine has more electron affinity than Flourine, even though E.A decreases down a group?

3) Formulae related to Mole Concept of Stoichiometry.

Answer 1

sorry third question i dont know but i try after reading ICC board tab tak ke liye pending

Answer 2

Heya...

Here's your answer.........

1. The formation of cation is an endothermic reaction because to form a cation you need to supply heat. This is because a cation means loosing electrons to gain +ve charge.

2. Since fluorine has its valence electrons in the n=2 energy level, and since chlorine has its valence electrons in the n=3 energy level, one would initially expect that an electron rushing towards fluorine would release more energy, as it would land in the n=2 energy level, whereas in chlorine, the electron would land only in the n=3 energy level, and would then not release as much energy. Thus, one would expect fluorine to have a greater electron affinity than chlorine. However, why is it that chlorine has a higher electron affinity (349 kJ/mol) than fluorine (328.165 kJ/mol)

3. It's in pic......

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✨✨✨✨BY BeWaFa ✨✨✨

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Thanks...!!!

XD

Sorry baby 'wink'