Structure and bonding in solids-crystals and glasses, Chemistry

 

Crystals and glasses

 

Unlike a complex ion or molecule, which is a finite (often small) assembly of atoms, a solid has no fixed shape and size but can add atoms indefinitely. In a sample of uniform composition the bonding arrangements of atoms are expected to be similar as throughout. As defined: both glassy and crystalline forms of silica (SiO2) have structures with each Si surrounded by four oxygen atoms, and each O by two Si. However in crystalline solids it is possible to detect a unit cell containing a group of atoms that is repeated indefinitely in precise geometric fashion. In practice, all crystals have defects where this regularity is broken sometimes, but nevertheless crystals are different from glasses or non-crystalline solids, where there is no regular repetition.

 

 

Posted Date: 7/23/2012 12:37:09 AM | Location : United States







Related Discussions:- Structure and bonding in solids-crystals and glasses, Assignment Help, Ask Question on Structure and bonding in solids-crystals and glasses, Get Answer, Expert's Help, Structure and bonding in solids-crystals and glasses Discussions

Write discussion on Structure and bonding in solids-crystals and glasses
Your posts are moderated
Related Questions
Q. What is compound? A compound is a substance which consists of two or more elements chemically combined. The elements in a compound aren't simply mingled together as they a

what is the relationship between the rate of cooling and the size of crystals?

what are the various steps involved in metal extraction?

Why Ionic compound does not show the property of space isomerism Ans) Ionic bond is Electrostatic. It is non directional, so Ionic compounds does not represent the property of

Q. Extraction of f-block element ? As all the lanthanides occur together in nature, their extraction involves two main steps: (i)   separation from one another and (ii) reducti

What are the distinguishing characteristics of metallic bonding? The metallic state can be imagine as an array of positive ions, with a common pool of electrons to which all th

I have a very difficult chemistry online assignment due in and I need help.

Why was covalent compounds are insoluble in water and ionic compounds soluble in water? Ans) When ionic bonds form, one atom becomes positively charged, while the other becomes ne


Why bromoethane are insoluble Because only two layers form, two of the three substances are mutually soluble. we know that water and bromoethane are insoluble-they form two lay