Liquid the distances between the molecules become smaller. When the liquid reaches its freezing point the molecules will usually lock into a very specific order, called crystallizing, and the bonds between them become more rigid, changing the liquid into its solid state (unless supercooling occurs). Only two elements are liquid at standard conditions for temperature and pressure: mercury and bromine. Four more elements have melting points slightly above room temperature: francium, caesium, gallium and rubidium. Metal alloys that are liquid at room temperature include NaK, a sodium-potassium metal alloy, galinstan, a fusible alloy liquid, and some amalgams (alloys involving mercury). Pure
Liquid metal make a small flexible antenna. In Mathieu's paper, a method for implementing a 3D flexible antenna is proposed. The method uses a Fused Deposition Modeling (FDM) technique to fabricate a dielectric radome in a NinjaFlex flexible plastic. This technique can also be used to design fully flexible antennas. The main advantage of this method is that it can realize 3D structures with large thickness values. Antenna material and structural parameters like this: 1. the Galinstan liquid metal(68.5%Ga, 21.5%In, 10%Sn, conductivity3.46×106S/m), which is used to realize the radiating element; 2. the NinjaFlex flexible plastic used to realize, through a 3D FDM