Honors Chemistry
Electronegativity
Examples:
Electrons are pulled, as in a tug-of-war, between atoms in a chemical bond. The difference in the electronegativity
values of the two atoms involved in the bond determines the bond type. The type of bond influences some of the physical
and chemical properties of the compound that we will examine more later.
AEN ("delta E N")= electronegativity difference between two atoms
AEN of 0.0-0.4 = nonpolar covalent bond (nonpolar = equal, covalent = sharing)
AEN of 0.5-1.6 polar covalent bond (polar- unequal, covalent=sharing)
AEN of 1.7-3.3= ionic bond (ionicions)
Bond
C-O
O-C
Mg-1
C-H
K-CI
F-F
H-H
Na-Br
Zn-O
C-F
C-P
P-O
AI-O
Ca-F
Name:
difference and bond types
N-O
Atom 1 EN
C
2.5
Atom 2 EN
O
3.5
ΔΕΝ
Period:
3.5-2.5 1.0
Bond type
polar covalent