When hesitating to say something that might either hurt the other party or put the speaker in bad light, do the following expressions differ:
そんなことは言い辛い{づらい}そんなことは言い難い{にくい}そんなことは言い難い{がたい}
そんなことは言い辛い{づらい}
そんなことは言い難い{にくい}
そんなことは言い難い{がたい}
Or are they perfect synonyms?
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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