Question

The homogeneous solids, arranged symmetrically, directed at definite angles and having definite geometrical shapes are called _______.

Answer 1

Hint : Homogeneous solids are a mineral which is composed of a single solid substance of uniform composition that cannot be physically separated into simpler chemical compounds. Homogeneity is determined relative to the scale on which it is defined. A material that is homogeneous is uniform in composition or character (i.e., colour, shape, size, weight, height, distribution, temperature, radioactivity, etc.).

Complete Step By Step Answer:
The homogeneous solids bounded by the plane surfaces directed at definite angles and having definite geometrical shapes are called crystals or crystalline solids.
A crystal or crystalline solid is a solid material whose constituents (such as atoms, molecules, or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions. Macroscopic single crystals are usually identifiable by their geometrical shape, consisting of flat faces with specific, characteristic orientations. Examples of large crystals include snowflakes, diamonds, and table salt.
Most inorganic solids are not crystals but polycrystals, i.e., many microscopic crystals fused together into a single solid. Examples of polycrystals include most metals, rocks, ceramics, and ice.

Note :
Despite the name, lead crystal, crystal glass, and related products are not crystals, but rather types of glass, i.e., amorphous solids. Amorphous solids have no periodic structure whatsoever. Examples of amorphous solids include glass, wax, and many plastics. Amorphous solids are also known as super cooled liquids. Amorphous solids also show a tendency of crystallisation at high temperature and pressure gradient.