2.3 Chemical Bonding and Electronegativity

Question 1

electronegativity

Answer 1

The ability of an individual atom when
bonded, to attract bonding electrons to itself.

Question 2

The _____ the electronegativity the ______
the pull on the electrons

Answer 2

higher; stronger

Question 3

We can determine the type of ______ that
would occur between two ___ (ionic or
molecular) by comparing the ____________
values of the atoms.

Answer 3

bonding; atoms; electronegativity

Question 4

The symbol ∆EN stands for…

Answer 4

the difference in electronegativity between two values

Question 5

0 - 0.5

Answer 5

non-polar covalent

Question 6

0.5 - 1.7

Answer 6

polar covalent

Question 7

1.7 - 3.3

Answer 7

ionic

Question 8

electronegativity trend

Answer 8

Electronegativity increases as we move from left to right.

Question 9

explanation of the trend

Answer 9

The atoms farther to the right have valence electrons that are pulled closer to the atomic nucleus due to the increase number of protons.

The atom therefore attracts a bonding pair of electrons more strongly because the pair can move closer to the nucleus

Question 10

non-polar covalent bond

Answer 10

a covalent bond formed between atoms with identical(or very similar) electronegatigvities

Question 11

polar covalent bond

Answer 11

a covalent bond formed between atoms with significantly different electronegativities resulting in a bond with localized positive or negative charges or poles