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!
Illustrate the salient aspects of ionic and metallic bonded crystals.
Properties
Ionic
Metallic
Bonding
Force
The bonds exist due electro- static force of attraction between positive and negative ions of different elements
The bonds exist due to electro- static force of attraction between the electron cloud of valence electrons and positive ions of same or, different metallic elements.
Bond Ionation
Ionic bond is most easily formed when one of the atoms has smaller number of valence electrons, such as the alkali metals and alkali earths (by transfer of electrons).
This type of bond is characteristic of the elements having small numbers of valence electrons, which are loosely held, so that they can be released to the common pool.
Conductivity
Low conductivity is the property of solids formed by ionic bonding.
Good thermal and electrical conductivity is the property of most of the solids formed by metallic bonding.
Mechanical
Solids formed have high hardness.
Ionic crystals tend to break along
Certain planes of crystals rather
Than to deform in a ductile fashion When subjected to stresses.
Solids formed mostly have good ductility.
Bond
Strength
These bonds are generally stronger than metallic bonds.
These bonds are generally less stronger than ionic bonds.
The mass of a photon with a wavelength equal to 1.54 x 10 -8 cm is: (1) 0.8268 x 10 -34 kg (2) 1.287 x10 -33 kg (3)1.4285x 10 -32 k
chain shortening in aldoses
Question: a) If you were a newly appointed environmental engineer in a wastewater treatment plant and one of your tasks was to characterise the wastewater. According to you,
Why magnesium does not impart any colour to Bunsen flame while calcium does
Why cyclo propane is more stable than cyclohexane
observation table with solution
Isomers, which vary in the rotation of the plane polarized light, are known as Optical Isomerism.
convert n-propyl alcohol to iso propyl alcohol
Ask quThe maximum number of electrons which each sub-shell can occupy is 2(2l+1)
Q. Extensive chemistry of the boron hydrides? The extensive chemistry of the boron hydrides finds no parallel with the hydrides of heavier elements of Group 13. Out of the four
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: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd