Why is the electron affinity of Alkaline metals negative?
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Shouldn't it be positive meaning it requires energy to add an electron to the atom? Doesnt the added electron destabilize the atom because the added electron would repell the electron in the s-orbital? Please explain in details as possible.
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Answer:
Matt Harbowy at Quora Visit the source
Other answers
The work done in bringing an electron in from infinity to r, the atomic radius appears as energy and is sufficient to overcome any electron repulsion.
Michael Flynn
In alkaline metals, the metals have a tendency to lose electrons and become stable via complete octet but also they have a tendency to gain electron (difficult though it may be) to complete 2s(2) subshell as it is in 2s(1) initially. Thus it will warmly welcome an electron as it is having its potential lowered in 2s(2).
Aditya Chaugule
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