Ionic crystals depend upon the structure and the size of their ions. In the structure of NaCl each Na+ ion is surrounded by six chloride ions. The following figure shows how these ions are arranged in the crystal lattice. It is clear that Na+ ion has ten electrons while Cl– has 18 electrons. The size…
Ionic solids are those crystalline solids in which the particles forming the crystal are positively and negatively charged ions, held together by strong electrostatic forces of attraction (ionic bonds). Examples: The crystals of NaCl, KBr etc. are ionic solids. Properties of ionic Solids (1) Physical State: A well-defined geometrical pattern, describe the arrangements of the…
A crystal lattice is defined as an array of points representing atoms, ions or molecules of a crystal, arranged at different sites in three dimensional space. Formation: A crystal may contains atoms, ions or molecules. In crystalline solids, these atoms, ions or molecules are located at definite positions in space. These are represented by points…
Geometrical Shape Crystalline Solids Due to definite and orderly arrangement of atoms, ions or molecules in three-dimensional space, all the crystalline solids have a definite, distinctive geometrical shape. For a given crystal, the interfacial angles, at which the surfaces intersect, are always the same no matter in which shape they are grown. The faces and…
Solids can be classified on the basis of the regular arrangements of constituent atoms, ions or molecules. There are two types of solids in this respect: Crystalline Solids Those solids in which atoms, ions or molecules are arranged in a definite three-dimensional patterns with regular and repetitive characteristics are called crystalline solids. Amorphous Solids The…
1. Solids have definite volume and shape. This is because the attractive forces among the particles of solids are very strong. 2. The particles of solids are very close to each other and they are tightly packed. This is why they are non-compressible and they cannot diffuse into each other. 3. The solid particles possess…