How can I determine the electronegativity difference and the type of chemical bond of the following elements:?

Question

H-O
H-N
H-Cl

Please simplify it, this is all new to me.
Thank you

Answer 1

In your text you should find a table of electronegative values for each element. Subtract the value of O and H to get the difference. The higher the difference the more polar the bond.

http://www.chem.umass.edu/~botch/Chem111F02/Chapters/Ch9/Electronegativity.jpg

[This link takes you to a periodic table with the electronegativity values of each element.]

http://www.chemguide.co.uk/atoms/bonding/electroneg.html

[The link above gives a good explanation with simple diagrams to illustrate the concept.]

Answer 2

Electronegativity H = 2.1
...........".................O = 3.5
3.5 - 2.1 = 1.4 the bond between H and O is covalent ( polar)

Electronegativity N = 3.0
3.0 - 2.1 = 0.9 the bond between N and H is covalent (polar)

Electronegativity Cl = 3.0
3.0 - 2.1 = 0.9 the bond between H and Cl is covalent ( polar)