Friday, March 24, 2017

Why do atoms have electron Affinity?




Atoms are stable so how can they pull electrons i.e how do they have any electron affinity at all?




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periodic trends - Comparing radii in lithium, beryllium, magnesium, aluminium and sodium ions

Apparently the of last four, $\ce{Mg^2+}$ is closest in radius to $\ce{Li+}$. Is this true, and if so, why would a whole larger shell ($\ce{...