Tag: general characteristics and uses of metals

It should be light to make aerospace material. Beryllium has low density and also has high thermal conductivity.

Gallium is a metal with lowest melting point. When we hold it and apply pressure with fingers, It melts at room temperature because of low melting point so, it is used by magicians.

The basic difference between metals and non-metals is the extent of bonding.Metals have very high extent of bonding than that in non-metals which makes the metal malleable.

Like non-metals, zinc is an exception among metals that does not shows malleability.

Malleability is the property of metal whereas non-metals are generally brittle,non conducting and have low density.

Malleability in metals occurs because of the metallic bonds that keep the atoms in place. Metallic bonds, characterized by a 'sea' of electrons that easily move from atom to another, allow the metal atoms to slide past each other if a force is applied. Non-metals are hard and brittle due to the absence of these electron pools of metallic bonds. 

Metals are malleable. In given options, carbon is non-metal and thus is hard and non-malleable. 

Oxidation of sodium gives sodium oxide, $Na _2O$ and about 20% sodium peroxide,$Na _2O _2$.

Carbon is a non-malleable element. Malleability is a physical property of matter, usually metals to bend or be hammered into other shapes without breaking. Carbon do not deform due to absence of the  metallic bonds which is required to be malleable as it keep the atoms in place and allows one electron slip over another. 

Potassium is an extremely active metal that reacts violently with oxygen in air. Potassium oxidizes faster than most metals and forms oxides with oxygen-oxygen bonds. Three species are formed during the reaction: potassium oxide, potassium peroxide, and potassium superoxide.