When Hard-Pressed, Hydrogen Becomes a Metal

When Hard-Pressed, Hydrogen Becomes a Metal 

This order is observed experimentally for direct reactions between the solid alkali metals and nonmetals. However, this order of reducing ability is not observed when the alkali metals react in aqueous solution. For example, the reduction of water by an alkali metal is very vigorous and exothermic  

The order of reducing abilities observed for this reaction (for the first three 

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