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2010-04-19 21:21:02
2010-04-19 21:21:02

Because they decompose the water to pure hydrogen and oxygen. The hydrogen is a flammable gas and the oxygen is the oxidizing agent that reacts together in an explosive manner.
Caesium

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Pick one. They all do it, and the farther down the period you go the more violently it'll explode.


Potassium is an alkali metal, which means it will react explosively with water.


Potassium is an Alkali Metal and it is classified as a powdery metal which must be kept in a container because it oxidizes readily when exposed to air. A pellet of potassium will explode when it is dropped into water. Another words, its very reactive.


Improve Alkali Metal + Water ------> Alkali Hydroxide + Hydrogen Alkali Metal Oxide + Water ------> Alkali Hydroxide + Water


Potassium is the only metal (alkali metal) where a flame is present. Lithium and sodium fizz but there is no flame. Caesium, francium and rubidium all explode on contact with water.


That depends on what metal you add and what the aquous solution is made of. But most metals don't react with water, alkali-metals excepted: they explode with water


yes an alkali metal reacts in water as a transition metal does not


Yes, Potassium is an alkali metals, along with its brothers, Lithium, Sodium, Rubidium Cesium, and Francium. They are very reactive when exposed to air or water.


It reacts strongly in water and bursts into flames when exposed to air. =] and it is the third most reactive alkali metal


No, an alkali is a type of metal.


All alkali metals react violently with water.


Yes, the pH increases because the alkali metal atoms replace some hydrogen ions in the water with alkali metal ions.


Silver wouldn't explode at all in water! Unless it were the alkali/alkaline earth metals they would.


Generally no, but alkali and alkali earths metals can react with water.


Alkali Metal + Water ------> Alkali Hydroxide + Hydrogen Alkali Metal Oxide + Water ------> Alkali Hydroxide + Water Example: ================ Sodium + Water ------> Sodium Hydroxide + Hydrogen 2 Na + 2 H2O --------> 2 NaOH + H2


metal rusts when exposed to water and oxygen


It is a Alkali earth metal and is highly reactive to water, if dropped in water, it will explode and light in fire immediately. It is very soft and is stored in oil or kerosene to prevent it from reacting with the water molecules in the air.


Sodium metal produces sodium hydroxide in water which is a very strong alkali


An alkali metal (such as Li, Na, K) reacts with cold water violently and exothermically to produce the alkali metal hydroxide and hydrogen gas. The heat produced from the reaction is sufficient to ignite the hydrogen gas, resulting in a flame around the metal.


Alkali metals such as sodium, potassium


Alkali metals and alkali earth metals react with water; the other metals doesn't react.


Alkali metals and water react in a violent manner; they form strong bases and hydrogen gas and can result in an explosion.


The Alkali metals melt in water so: Rubidium is one example of a metal that melts in water.



any pure alkali metal (such as sodium)



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