Electron gain enthalpy negative hone ka matlab kya hai?

Negative matlab atom electron lene par energy RELEASE karta hai — woh electron chahta hai (exothermic). Jitna zyada negative, utna zyada chahta. Positive matlab electron ghusane me energy LAGTI hai (endothermic) — atom mana kar raha hota hai.

Cl ki ΔegH, F se zyada negative kyun hai jabki F upar hai?

F bahut chhota hai; uske compact 2p subshell me aane wale electron ko pehle se bhare electrons zyada repel karte hain. Cl bada hai, repulsion kam — isliye Cl (−349) F (−328) se zyada exothermic. Group 17 me Cl sabse −ve hoti hai.

Be, Mg, N aur noble gases ki ΔegH positive kyun hoti hai?

Be aur Mg ka ns² fully-filled, N ka 2p³ half-filled, aur noble gases ka octet — ye sab extra stable configurations hain. Inme extra electron daalne ke liye energy deni padti hai, isliye ΔegH positive (endothermic).

Doosra electron gain enthalpy hamesha positive kyun hoti hai?

Pehla electron lene ke baad atom −1 anion ban jata hai. Ab aane wala electron (−) aur anion (−) — same charge, isliye repulsion. Electron ko zabardasti ghusana padta hai, energy LAGTI hai. Isiliye O⁻ → O²⁻ ke liye +780 kJ/mol, aur O²⁻ banana overall endothermic hota hai.

InorganicMediumNEET: 2–3 Q/year Q3D

Electron Gain Enthalpy — Feed the Atom

Classification of Elements & Periodicity

Offer an electron to a gaseous atom and watch the energy meter. Almost every atom is hungry — it gulps the electron and releases energy. Only Be, Mg, N and the noble gases refuse. And nobody wants the second electron.

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Electron Gain Enthalpy — Feed the Atom

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Practice

Learned it? Now prove it under the clock.

How to use this lab