Bonds between 1.5 and 2  [ENDORSED]

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Hussein Saleh 1L
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Joined: Tue Feb 20, 2018 3:01 am

Bonds between 1.5 and 2

Postby Hussein Saleh 1L » Wed May 16, 2018 1:01 pm

In class professor Lavelle talked about the difference between ionic and covalent bonds in terms of differences between electronegativity. My question is what type of bonds are found in between the difference of electronegativities of 1.5 and 2.

Jocelyn Fermin1J
Posts: 49
Joined: Tue Nov 14, 2017 3:01 am

Re: Bonds between 1.5 and 2

Postby Jocelyn Fermin1J » Wed May 16, 2018 3:51 pm

If there is a metal involved in the formula when calculating the electronegativity and the answer is between 1.5-2.0 then it is ionic. If a nonmetal is involved and the electronegativity is between 1.5-2.0 it is polar/covalent. Why is the bond polar/covalent for nonmetals and ionic for metals?

Corryn Doll
Posts: 31
Joined: Fri Apr 06, 2018 11:02 am

Re: Bonds between 1.5 and 2

Postby Corryn Doll » Wed May 16, 2018 9:40 pm

The bond is ionic for metals because an ionic bond is formed by two oppositely charged ions and their attraction to one another. Ionic bonds form between a cation (which is generally a metal) and an anion (which is generally not a metal). The bond is polar/covalent for non-metals because it occurs through the sharing of electrons rather than ionic charge. Because of this, covalent bonds occur between two non-metals.

Here is a website that might help: https://courses.lumenlearning.com/bound ... nonmetals/

Hope this helped!! :)

Cameron Smith 1I
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Re: Bonds between 1.5 and 2

Postby Cameron Smith 1I » Sat May 19, 2018 7:21 pm

The closer the distance between the electronegativities is to 2 then the bond has more ionic character. The closer the distance between the electronegativities is to 1.5, the bond has more covalent character.

Allen Chen 1J
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Joined: Wed Nov 15, 2017 3:04 am

Re: Bonds between 1.5 and 2

Postby Allen Chen 1J » Sat May 19, 2018 10:27 pm

It is just a grey area where we are even more uncertain whether the bond has covalent or ionic character

Beverly Shih 1K
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Re: Bonds between 1.5 and 2  [ENDORSED]

Postby Beverly Shih 1K » Sat May 19, 2018 11:13 pm

The numbers 1.5 and 2 are just guidelines. There are exceptions, like Mg-Cl bonds which have a difference in electronegativity of 1.85 but are ionic. For bonds between 1.5 and 2, it is just even harder to determine what type a bond is based solely on its electronegativity.


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