完成前とずいぶん色が違うじゃねぇか！
In this sentence, what is じゃねぇか?
Answer
じゃねぇか is just a colloquial form of the tag question じゃないか.
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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