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Solid State

 As we all know that the first state of matter is solid.The most important feature of solid is that it possess a definite shape and also possess least diffusion property.          Solid can be mainly classify into two. They are crystalline soluds and Amorphous solids.           In the case of crystalline solids, these type of above mentioned solids possess all the property of solids ie. Crystalline solid is a true solid.          Crystalline solids possess a definite heat of fusion and a sharp melting point.           The most important property is that all crystalline solids possess the property called Anisotropy.            Anisotropy is that certain physical property like refractive index, electrical resistance show different values at different angles of a solid crystal.             An amorphous solid does not possess al...
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1. What are Metals? 2. Why metals conduct electricity? 3. What are the properties of metals?
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Metallic bond is the reaction between molecules within metals called alkali reactive force. It is the sharing of a sea of delocalised electrons amongst a lattice of positive ions, where the electrons act as a "glue" giving the substance a definite structure. The electrons and the positive ions in the metal have a strong attractive force between them. Therefore metals often have high melting or boiling points. The principle is similar to that of ionic bonds . The metallic bond accounts for many physical characteristics of metals, such as strength , malleability , ductility , luster , conduction of heat and electricity . Because the electrons move independently of the positive ions in a sea of negative charge, the metal gains some electrical conductivity. It allows the energy to pass quickly through the electrons generating a current . Heat conduction works on the same principle - the free electrons can transfer the energy at a faster rate than other substanc...
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Metallic bonding constitutes the electrostatic attractive forces between the delocalized electrons , called conduction electrons , gathered in an electron cloud and the positively charged metal ions. Understood as the sharing of "free" electrons among a lattice of positively charged ions ( cations ), metallic bonding is sometimes compared with that of molten salts ; however, this simplistic view [ which? ] holds true for very few [ which? ] metals . In a more quantum-mechanical view, the conduction electrons divide their density equally over all atoms that function as neutral (non-charged) entities. [ citation needed ] Metallic bonding accounts for many physical properties of metals, such as strength , ductility , thermal and electrical conductivity , opacity , and luster . [ 1 ] [ 2 ] [ 3 ] [ 4 ] Although the term "metallic bond" is often used in contrast to the term " covalent bond ", it is preferable [ by whom? ] to use the term metallic bon...
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1.What is a covalent bond? 2.Which type of atoms usually taking part in covalent bonding?
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