Before using an iPhone, what bracha should I say? On one side, it's Apple, so it could be "bore peri haetz". But on the other side, it is made of metal, so it could also be "bore peri matechet".
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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