Question

Which metal has a very low melting point?

Answer 1

Hint :The temperature at which a solid converts into a liquid at the atmospheric pressure is known as melting point and the process is called melting. This is the point at which both the liquid phase and the solid phase exist at equilibrium.

Complete Step By Step Answer:
The element gallium has a very low melting point and it starts melting in hand. This element possesses some properties for a heat-transfer liquid. It is a very unique material having a low melting point and high boiling point. Pure gallium melts at ${29.78^ \circ }C$ and suitable alloying of this element will produce a metal that melts below the room temperature. Pure gallium is not harmful for humans to touch. It is a soft, silvery metal at standard temperature and pressure. In its liquid state, it becomes silvery white. It belongs to the group $13$ of the modern periodic table and it has similarities to other metals of the group, aluminium, thallium and indium. Gallium is not found in its free state in nature but it is found in trace amounts in zinc ores like sphalerite and bauxite.
Therefore, the metal gallium has a very low melting point.

Note :
The element gallium is used to make alloys with low melting points. It is also used in semiconductors as a dopant. The boiling point of gallium is more than eight times higher than its melting point on the absolute scale. So, gallium has the greatest ratio between melting point and boiling point.