Are all componds ionic

Question

how do you tell if they are different

Answer 1

no, bonds vary with covalent and ionic characteristics due to differences in electronegativity  

Answer 2

OF COURSE NOT!!There is covalent bonds!!

J think there is nine covalent bonds!!!

Answer 3

some are covallent and some ionic.  

Answer 4

In one word NO!!!!

Answer 5

no... there are what we call "molecular compounds," compounds that are not ionic.

Examples are table sugar (C12H22O11), and the likes.

Answer 6

No.  In fact there are NO 100 percent ionic compounds.  Even the bonds in CsF which have the greatest electronegativity difference (DEN) are 8 percent covalent.    

More chemical bonds are covalent than are ionic.  All bonds like along a continuum between ionic and covalent and have some characteristics of both.   We choose an arbitrary point (where the electronegativity difference is above 2.0) to say that a bond is predominately ionic.

It is possible to compute the percent ionic character in a bond with the following formula:

percent ionic character = 100(1 - e^(-DEN^2/4) )

=========== Follow up ===========

Lexa,

Bonds are predominately ionic or covalent.  The word "polar" is used to describe some covalent bonds.  A covalent bond is either nonpolar, or a covalent bond is polar.  We can use the electronegativity difference to make predictions about bonds.

DEN  ....  Type of bond

0  to 0.5 = nonpolar covalent

0.5 to 2.0 = polar covalent

2.0 - 3.3 = ionic

I know you've quoted the website to which you gave a link, but that doesn't make it correct.  These numbers are strictly arbitrary, but the breakdown I've given above is a better description of how DEN is used to describe bonds.

Answer 7

Of course not, some ones are covalent

Answer 8

You can tell the difference by the electronegativities (chart included in the sources)

there are mainly three types of bonds: covalent, ionic and polar.

The three are distinguished loosely by the difference in electronegativity like so:

Covalent: if difference is less than 1.2

Polar: if difference is between 1.2 and 1.8

Ionic: if difference is greater than 1.8

You must understand that no bond is completely covalent, polar or ionic. They are just mostly one of them, thus the numbers are loosely used, some teachers use different ones, some sites give different boundaries, but they are usually pretty close.