difference b/w amorphous solid and crystalline solid

Crystalline and Amorphous Solids - Solids have definite shape and volume because the average distance between the molecules or atoms remain constant and do not change with time. The arrangement of molecules inside a solid differ from one t..

Mechanics of Solids and Fluids..

Crystalline Solids - Crystalline substances have a definite rigid shape. The shape and size of crystals (even of the same materials) differs depending upon the conditions under which they are grown. Crystals of a given substance are bound by plane surfaces ca..

Crystalline substances have a definite rigid shape. The shape and size of crystals (even of the same materials) differs depending upon the conditions under which they are grown. Crystals of a given substance are bound by plane surfaces called faces. The angle between any two fac..

Substances whose particles do not posses a regular orderly arrangement but have short range order. When amorphous solids are heated they become crystalline at some temperature. Properties of amorphous solids are: They do not have sharp melting point..

(kernels) and mobile electrons Metallic bonds All metals and some alloys Some substances adopt different structural arrangements under different conditions. Such arrangements are called Polymorphs . Example: Diamond and graphite are two different polymorphic forms of c..

Classification of Solids - The above properties suggest that the properties of the solids not only depend upon the nature of the constituents, but also on their arrangements. Based on their structural features solids can be classified into three categories: Crysta..

: Crystalline Amorphous In a crystalline substance, a definite well-defined external geometric shape such as cube, octahedron or tetrahedron characterizes the solid..

Heterogeneous catalysis is extensively used in chemical industry. Hence, development, selection and application of solid catalysts forms an important area in surface chemistry studies. The nature of the solid catalyst has profound effects on heterogeneous catalytic reactions. ..