Posted by Kate on Wednesday, January 7, 2009 at 8:20pm.
I think that the longer the bond length the weaker the covalent bond.
1. How does the strenght of a covalent bond relate to bond length?
Weaker bonds have longer bond lengths; stronger bonds have shorter bond lengths.
2. Compare the degree of polarity in HF, HCL, HBr, and HI?
Look up the electronegativity of each element in the pair and subtract them. The more difference the more ionic the bond (more polar). For example,
H is 2.1 and F is 4.0. Difference is 1.9
H is 2.1 and Cl is 3.5. Difference is 1.4. Therefore, HF has more ionic character (more polar) than HCl.
3. Given that it has the highest electronegativity, can a fluorine atom ever from a non-polar covalent bond?
Explain your answer.
Of course. What about F2 (F bonding with itself)? So the difference in EN is 4.0 - 4.0 = 0 and it is a covalent bond (100% covalent).
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