Wednesday, January 25, 2017

Verb past tense



Why do some past tense ru verbs conjugate with た(食べた) and others with った(帰った)？




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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{...