Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
What is a covalent crystal?
A covalent crystal is one in which the lattice structure is held together by powerful covalent bonds. These crystals tend not to be soluble in water and have a much higher bond strength than ionic crystals. For example, silica, SiO2, does not dissolve in water and has a high melting point. Silica is what glass is made out of. Imagine trying to make a glass out of salt crystals; it would dissolve before you could drink a glass of water out of it! Solubility is a major difference between covalent and ionic crystals.
Diamonds are a great example of how strong the bonds in a covalent crystal can be. The lattice structure of diamonds produces the hardest known substance in the universe.
To complicate things, the vast majority of complex minerals are a combination of ionic and covalent bonds. These crystals will not be discussed in depth in this lesson, but it is important to know that this third category exists, and it is the largest category of minerals and crystals. If you observe the complex formulas of many minerals, like muscovite, which is KAl3Si3O10(OH)2, you will see that it is not so cut and dry what type of bond is holding these atoms together. Is this a covalent or ionic mineral? The answer is: it is both.
Niacin (vitamin B3) Though niacin or nicotinic acid has been known to the organic chemists since 1867 and Funk isolated it from yeast and rice polishing in order to identif
Explain an Amniocentesis An amniocentesis is a process used to obtain a small sample of the amniotic fluid which surrounds the foetus to diagnose chromosomal disorders and open
Carbon atoms of fatty acids are numbered from carboxyl carbon. Various conventions are used to indicate the position of double bonds in the fatty acid molecules. Like,
How to make a constellarium A constellarium is a simple device used in teaching the shapes of several constellations. Get a cardboard or wood box and remove one end. Draw the s
characteristics
Explain the Functions of the liver Secretion of bile: The liver cells are able to synthesize bile. All constituents of bile are not present in the liver. Liver cells use differ
Define Glucose and Fructose - Abnormal Constituents of Urine Abnormal Constituents of Urine The detection of abnormal constituents in urine indicates the presence of certa
Floating a razor blade Secure a used razor blade of the double edge type. Try floating it on the surface of water. Again watch the surface and see if the surface film dips unde
what are composites?
why the atoms in neon gas do no join up in the same way that hydrogen atoms do?
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd