If one said sim shalom in the maariv shmoneh esrei instead of shalom rav what should he do?
What happens in the reverse case if one said shalom rav at shaachris, does he fulfill his shmoneh esrei?
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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