why 1st ionisation enthalpy of Na is lower than mg but its 2nd ionisation enthalpy is higher than Mg?
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1st ionization energy is liye low hota hai kuki us tym na stable ni hota so isliye bohot jldi last shell removed ho jata hai . Bt 2nd tym jab hm energy dete hai to already stable hai so na ni chega ki wo unstable ho to kada energy pass krna prta hai thats y 1st ionization energy lower then 2nd
harsh3940:
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