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Lattice enrgy :Lattice energy and Born-Haber cycle 30 May 2012 | 08:45 am
Lattice energy is the change in energy that occurs when an ionic solid is seperated into isolated ions in the gas phase.For sodium NaCl (s) ------------> Na+ (g) + Cl- (g) The distance between io...
How to compare the bond length ? 25 May 2012 | 09:08 am
Solution: First write the lewis formulas , to figure if there is a single, double or triple bonding between the nitrogen-nitrogen atoms. N2H4 has single bonding between Nitrogen atoms, N2 has triple ...
Bond order: What is bond order? 23 May 2012 | 10:26 am
The bond order, defined in terms of the Lewis formula,is the number of pairs of electrons in a bond. For example: in C-C bond the bond order is 1 (single bond); in C=C the bond order is 2 (double bo...
Bond energy: What is bond energy ? 22 May 2012 | 09:06 am
Bond energy is defined as average enthalpy change for the breaking of an A-B bond in a molecule in the gas phase. When we describe the formation of a covalent bond,we introduced the concept of bond d...
Bond length : What is bond length ? 17 May 2012 | 07:11 am
The bond length of the covalent bond is the nuclear seperation distance where the molecule is most stable.Or in simple words, bond length is the distance between the nuclei in a bond .The H-H bond len...
What are the 'Exceptions to the octet rule" 17 May 2012 | 06:33 am
Here in this tutorial we will discuss about the cases where octet rule does not work.In many molecules atoms have electronic structure that stisfy the octet rule but a number of them do not. An octe...
Lewis structure:How to draw lewis structure 11 May 2012 | 09:24 am
Lewis structure of lewis electron dot formula of a molecule can be written easily written by following few steps.These steps will not only inspect you when u write lewis structure , you will also sav...
How to arrange atoms and ions in order of increasing or decreasing size 11 May 2012 | 08:33 am
solutions a) compare the other atoms with Mg.Al, to the right is smaller than Mg.Ca,below Mg,is larger.The predicted order is Al<Mg<Ca b) Compare with the S atom.Cl, to the right is smaller.The S2-...
Balance chemical equation programs 11 May 2012 | 06:13 am
http://www.chemos.co.uk/
Periodic trends:What is periodic trends of ionic radius 10 May 2012 | 09:16 am
We know that cations form when atom loses its electrons and anions form when atom gains electrons.Trends we discussed in other tutorial of atomic radius are clearly visible with ionic radii as well.So...
