Why. Alkali. Metals are kept. In kerosene
alkali metals
They are so reactive they even react with the moisture in the air. Storing under oil prevents this.
Any of the alkali metals: lithium, sodium, potassium, etc.
alkali metals
neither. it is a noble gas
K and Na are kept in kerosene to prevent them from reacting with oxygen and moisture in the air, which would quickly tarnish their surfaces. Kerosene forms a protective layer that helps to maintain the reactivity and appearance of these reactive metals.
The kerosene molecule does NOT have any oxygen atoms in the molecule; it is an hydrocarbon. Sodium metal will readily react with oxygen, be it in a molecule ( water) or the atmosphere ( atmospheric oxygen in the air). Hence to keep it away from oxygen, it is kept under kerosene. as are all the other Group(1) [alkali] metals.
Potassium, sodium, and lithium are softer and more reactive than other metals. They are typically stored in oil or kerosene to prevent them from reacting with moisture in the air.
Alkali metals are the most reactive metals.
alkali metals
Alkali metals are very reactive metals.
No, alkali metals are not the only earth metals. Earth metals include both alkali metals and alkaline earth metals. Alkaline earth metals are a group of elements in the periodic table that are chemically similar to, but less reactive than, alkali metals. Examples of alkaline earth metals include magnesium, calcium, and barium.
They are so reactive they even react with the moisture in the air. Storing under oil prevents this.
They don't
Alkali earth metals are named after their oxides, alkaline earth.
alkali metals
No, a coin is not an alkali. It's a metal or metal alloy. Alkali metals are very reactive and coins are not made of them. These metals react with the water in air, so they are stored beneath a liquid they do not react with (like kerosene), or in a gas they will not react with (like an inert gas). Making coins out of alkali metals would give entirely new meanings to "depreciation" and the phrase "money burns a hole in my pocket."