Question

Which among the following is a non-ductile metal at room temperature?
A) tungsten
B) lead
C) argentum
D) mercury

Answer 1

A metal is a substance that has a shiny look when freshly produced, polished, or shattered, and conducts electricity and heat reasonably effectively. Metals are either malleable or ductile (they may be hammered into thin sheets) (can be drawn into wires). Metals can be chemical elements like iron, alloys like stainless steel, or molecular compounds like polymeric sulphur nitride.

Complete Step By Step Answer:
Ductility is a mechanical characteristic that describes how easily a material may be drawn (e.g. into wire). In materials science, ductility refers to a material's ability to withstand plastic deformation under tensile stress before failing. Ductility is a key factor in engineering and manufacturing because it determines a material's adaptability for specific manufacturing procedures (such as cold working) and its ability to absorb mechanical overload. Gold and copper are two materials that are commonly regarded as ductile.
Ductility is especially critical in metalworking because metal-forming techniques cannot manage materials that crack, break, or shatter under stress. Cold stamping or pressing can be used to produce malleable materials, but brittle materials must be cast or thermoformed. Metallic bonds, which are present mostly in metals, provide high degrees of ductility, leading to the widespread belief that metals are ductile in general. Valence shell electrons are delocalized and shared among numerous atoms in metallic bonds. The delocalized electrons allow metal atoms to glide by one another without being harmed by strong repulsive forces that would otherwise shatter other materials.
Because mercury is a liquid at normal temperature, it cannot be pulled into wires.
Hence mercury does not possess ductility properties.
Option D is correct.

Note:
Mercury is an atomic number 80 chemical element with the symbol Hg. Quicksilver is a frequent name for it. Mercury is a heavy, silvery d-block element that is the only metallic element that is liquid at standard temperatures and pressures; the only other element that is liquid at these temperatures and pressures is the halogen bromine, though metals like caesium, gallium, and rubidium melt just above room temperature.