Question

Which statement is true?

A molecule having a covalent bond can be ionic.

A molecule having a covalent bond is always polar.

A molecule having a covalent bond may be polar or nonpolar.

A molecule having a covalent bond is always nonpolar

Answer 1

Any ideas?

Answer 2

http://www.csus.edu/indiv/t/toofanj/JThome/students/chem-110/CHE110-CH11.pdf

Answer 3

@ookawaiioo I have a feeling it is the third one but I am not positive.

Answer 4

i support your thought
so you can be positive about it :)

Answer 5

A molecule having a covalent bond can be ionic. - ridiculous

A molecule having a covalent bond is always polar. - not always like, H2, bond is covalent H-H and its non polar

A molecule having a covalent bond may be polar or nonpolar. - Bingo!

A molecule having a covalent bond is always nonpolar - not always like, HCl, bond is covalent H-Cl and its polar

Answer 6

But lets talk about.....what is "covalent" ?

Covalent is termed by the difference of electronegativity between the two species.

Less than 1.0 = covalent
1.0-1.4 = polar covalent
>1.5 = ionic

Answer 7

I might be a few units off......

Answer 8

@oOKawaiiOo 1.0 is too big
0.2 -0.5 is non polar covalent
more than 0.5 is polar covalent
if over 2.0 - ionic bond
but its slightly different in different places

Answer 9

I just looked it up.... it really depends on your source.

https://www.chem.wisc.edu/deptfiles/genchem/sstutorial/Text7/Tx71/tx71.html

Answer 10

yeah it does :) this current source says

> 1.7 ionic
0.4 - 1.7 polar covalent
< 0.4 covalent

Answer 11

Thanks to both!!

Answer 12

no problem :)