Why do we use wine (or grape juice - fruit of the vine) when sanctifying Shabbat? How was it first determined that wine was holy and that it is used to satisfy and make holy the coming holiday or shabbos. Is there a Torah source for using wine?
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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