3B.2 Electeonegativity and bond polarity

Question 1

what is Electeonegativity

Answer 1

the ability of an atom to attract a bond pair of electrons

Question 2

Electronegativity down the group

Answer 2

decrease

Question 3

Electronegativity across the period

Answer 3

increase

Question 4

what happens to the electron density of the atoms that have the same Electronegativity

Answer 4

electron density distribution would be symmetrical. because they both have the same ability to attract the bonding pair

Question 5

what happens to the electron density of atoms that have different Electronegativity

Answer 5

it wouldn’t be symmetrical, where the contour lines of the electron density would be closely packed near the one with higher Electronegativity

Question 6

what are polar covalent bonds

Answer 6

they are a type of covalent bonds where the pair of electrons would be unequally distributed; because of this one atom has a slight negative charge, and the other one would have a slight positive charge

Question 7

how do you represent polar covalent bonds

Answer 7

x δ+ —– yδ– or x—->— y

Question 8

polar covalent bonds are from which two bonding types?

Answer 8

1. pure (100%) covalent

2. pure (100%) ionic

Question 9

how does ionic bonding become the main bonding in polar covalent bonds

Answer 9

if the Electronegativity difference if large enough the main type of bonding is now ionic