Thursday, October 18, 2018

transactions - Receiving dishes from a Jew - toivel (immerse)?


I inherited a set of dishes from a Jew.


I don't know how observant this Jew was.


Do I need to toivel them?




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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{...