Tuesday, April 25, 2017

inorganic chemistry - Why does mercury decolourise a gold ring?


I saw that a gold ring decolourised as it got in contact with mercury . Why does this happen ? Is there any way to reverse this?




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periodic trends - Comparing radii in lithium, beryllium, magnesium, aluminium and sodium ions

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{...