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.
Temperature variations in glacial regions In glacial regions of the world or during forest fires the rocks are exposed to extreme temperatures. Since the conduction of heat is
Determine in detail about the Phosphorus Phosphorus, with nitrogen and potassium is classed as a major nutrient element. It is a constituent of nucleic acids, phytin, phosphol
What are the methods of preventing or reducing soil erosion? The methods of preventing or reducing soil erosion are: (i) Prevention of deforestation (ii) Plantation of tre
Explain the Menopause The cessation of menstruation is menopause. Natural menopause typically occurs between 45 and 55 years of age. It is caused by changes in concentration of
Determine the Pathways of Weathering Weathering and soil development proceed almost simultaneously in case of soft rocks, whereas in case of hard rocks weathering precedes soil
Define Glucose and Fructose - Abnormal Constituents of Urine Abnormal Constituents of Urine The detection of abnormal constituents in urine indicates the presence of certa
Explain the Cabinet Respiration Such an apparatus is used when the respiratory muscles are paralyzed by an injury or an infection. A cabinet respirator consists of a box in wh
Riboflavin Riboflavin has two major coenzyme derivatives, namely in mononucleotide (FM) which is the active component of riboflavin and is formed by the addition of a
Handling of Chemicals : Laboratory technicians who work in laboratories, need to be aware of the potential danger of the substances they handle. In the case of those working in ch
Explain the Porphyrins in the urine Porphyrins (a group of compounds containing the porphin structure, four pyrrole rings connected by methine bridges in a cyclic configuration
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