If I have a decent Hebrew knowledge, but not great, what books (i.e. dictionaries, lexicons, etc.) should I have at hand when I'm learning a sefer, such as the Mishneh Torah?
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{...
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