I have some problems with understanding what is the difference between these two. According to 初級日本語, 間 refers to certain time frame whereas 間に refers to certain time frame within that time frame. Is it correct or am I missing something?
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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