NaH je:
Správná odpověď je: C
Názvy dvouprvkových sloučenin prvků 1. a 2. skupiny PSP (periodické soustavy prvků) s vodíkem jsou dvouslovné ze slova „hydrid“ a označení druhého prvku se správnou koncovkou. U těchto sloučenin se vodík vyskytuje v oxidačním čísle −I (prvky 1. a 2. skupiny mají velmi nízkou elektronegativitu).
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