What if someone does know a lot of halachah and wanted to earn semichah and become a posek? Are there any good semichah programs which will award semichah with just a test (as opposed to a additional time requirement for example)?
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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