My family has a minhag to wait less time (3 hours as opposed to 6) between Meat and Milk on Shavuos. I was wondering if this has a written source?
[or if not, has anyone else heard of it?]
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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