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Science-Related Homework Help Chemistry Topic started by: tlaw92 on Sep 19, 2012



Title: What is the difference between a polar and a non-polar covalent bond?
Post by: tlaw92 on Sep 19, 2012
can u explain and give an example of each please
also...
Why is there no measured elactronegitivity value for He?


Title: What is the difference between a polar and a non-polar covalent bond?
Post by: rkarthik301 on Sep 19, 2012
covalent bonds means that electrons are being shared between atoms.

but the electrons might want to spend more time with one atom than the other.

non-polar covalent bonds means that the electrons are shared equally. It's like if you were to share a burger with someone. you eat half, the other person eats half.

polar covalent bonds means that the electrons are NOT shared equally. It's like if you were to share a burger with someone and you eat 2/3 of the burger and the other person eats 1/3 of it.

nonpolar covalent bonds Cl-Cl
since the two atoms are identical, they will share electrons equally.

polar covalent bonds: H-O-H
oxygen is an "electron hog" and so the electrons will spend more time with the oxygen than with the hydrogens. unequal sharing.


Title: What is the difference between a polar and a non-polar covalent bond?
Post by: tlello on Sep 19, 2012
A polar covalent bond has one atom that strongly attracts bonding electrons so that the electron distribution is not symmetrical. This can be predicted using electronegative values. CH3 - Cl is a polar covalent bond. the net dipole moment of the molecule is not zero. A non-polar covalent bond is one in which the electron distribution is symmetrical. it has a zero net dipole moment.