Friday, August 4, 2017

halacha - What do you have to check for Shatnez?


What do you and what do you not have to check for Shatnez?





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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{...