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← ScienceWhich outcome occurs when applying high pressure to hydrogen gas?
A)Transition to a metallic state✓
B)Increased molecular rotational energy
C)Formation of stable free radicals
D)Promotion to diatomic configuration
💡 Explanation
At high pressures, hydrogen molecules dissociate, and electrons become delocalized; electronic band theory causes a transition to a metallic state, because electrons can move freely. Therefore, hydrogen becomes conductive, rather than remaining an insulator, even as intramolecular vibrations still largely remain.
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