Solve the most spooky metal series in the world

Spooky metallic materials, which resist the laws of physics, have been created. What is the interesting fact behind these magical metals?

Metal 'has memory'.This spooky metal is a compound of Nikel and Titan.It has the 'superhuman' ability to "remember" its original shape and easily return to that shape after being deformed.

Ice Fire.This is the acetate type of sodium.It is liquid, but with a small impact, it hardens the material.This material is very difficult to cool.It is used to make chemical heating packs.

Self-explosive powder.Triiot nitrogen looks pretty much like dirt.However, this is an unstable material.Just a light touch is enough to make this substance explode.They are used primarily in experiments.When detonated, they create a purple-red smoke.

Gas 'sinks' .Hexaflouride gas is heavier than air.When 'locked' in a closed container, it automatically sinks to the bottom of the box.This colorless gas usually holds objects on its surface.We can 'draw' this gas with a common mug.

The metal melts like ice cream .This metal is quite similar to mercury, called Galium.It may melt at room temperature.If you place a gallium object in a cup of hot solution, it will quickly dissolve into this solution.