Which metal is preserved under water

See Shakhashiri below. When the white phosphorus ignites, the filter paper catches fire, lighting the carbon disulfide in the cylinder, and producing a sharp, "bark-like" sound. If I can ever get this to work right, I'll film it. White phosphorus is extremely toxic; the approximate fatal dose is about 50 to mg. Even in very small quantities, it produces severe gastrointestinal irritation, diarrhea, and liver damage.

It also causes burns when it comes in contact with skin. Chronic exposure to white phosphorus causes bony necrosis especially of the jaw, a condition called "phossy-jaw" and anemia. The questions posted on the site are solely user generated, Doubtnut has no ownership or control over the nature and content of those questions. Doubtnut is not responsible for any discrepancies concerning the duplicity of content over those questions.

Study Materials. Why use Doubtnut? Instant Video Solutions. Request OTP. Question : An element which is preserved under water is 1 sodium. Related Answer. Freeze drying preserve food under Freeze drying preserve food under. Sodium metal preserved under kerosine. This group lies in the s-block of the periodic table, as all alkali metals have their outermost electron in an s-orbital. The alkali metals provide the best example of group trends in properties in the periodic table, with elements exhibiting similar properties.

For instance, when moving down the table, all known alkali metals show:. In general, their densities increase when moving down the table, with the exception of potassium, which is less dense than sodium. Alkali metals react violently with water, halogens, and acids. The reactions release surprising amounts of heat and light.

In a chemical equation, alkali metals are represented with an M. Here are some sample reaction equations:. All the discovered alkali metals occur in nature. Experiments have been conducted to attempt the synthesis of ununennium Uue , which is likely to be the next member of the group if the attempt is successful.