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Brain Teasers
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Which Chemical Symbol represents the metal which reacts vigorously with cold water?
 
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  1. Which Chemical Symbol represents the metal which reacts vigorously with cold water?
    1. Mg
    2. Ag
    3. Hg
    4. K
    5. Fe
    1. The answer is K (Potassium), an extremely reactive metal which darts about Cold Water as it melts, burning off to form Potassium Hydroxide (KOH) and Hydrogen Gas (H). However, Mg (Magnesium) can react with steam, and Fe (Iron) will react with water to form rust, but only in the presence of Oxygen (O).