Sodium is a metal that reacts violently with water, sometimes bursting into flames. The reaction produces sodium hydroxide and hydrogen gas.
A metal oxide reacts with water to produce a metal hydroxide.
Potassium is the metal that reacts most vigorously with water at 25C.
The substance is likely sodium, a highly reactive metal that reacts violently with water to produce sodium hydroxide and hydrogen gas. The heat generated from this reaction can ignite the hydrogen gas, resulting in flames. Additionally, the reaction is so exothermic that it can be explosive.
The metal that reacts slowly with cold water to form a hydroxide is magnesium. When magnesium reacts with water, it forms magnesium hydroxide and hydrogen gas.
Zinc is a grey metal that can react with water, although it does so slowly. When zinc reacts with water, it produces zinc hydroxide and hydrogen gas.
I believe that you think to alkali metals (ex. sodium).
Diamond can disintegrate if heated enough and will give off carbon dioxide on water and disappear Any of the alkaline metals will burst into flames
A metal oxide reacts with water to produce a metal hydroxide.
Potassium is the metal that reacts most vigorously with water at 25C.
The substance is likely sodium, a highly reactive metal that reacts violently with water to produce sodium hydroxide and hydrogen gas. The heat generated from this reaction can ignite the hydrogen gas, resulting in flames. Additionally, the reaction is so exothermic that it can be explosive.
The metal that reacts slowly with cold water to form a hydroxide is magnesium. When magnesium reacts with water, it forms magnesium hydroxide and hydrogen gas.
When an alkali metal reacts with water, it produces an alkali metal hydroxide and hydrogen gas. This is a highly exothermic reaction, with the alkali metal displacing hydrogen from the water molecule.
Zinc is a grey metal that can react with water, although it does so slowly. When zinc reacts with water, it produces zinc hydroxide and hydrogen gas.
A corresponding metal salt and water are produced.
Water
copper
Metal hydroxide + hydrogen gas