polarisation

Question 1

define electronegativity?

Answer 1

is the ability to attract the bonding electrons in a covalent bond

Question 2

electronegativity is measured on the what scale?

Answer 2

Pauling scale

Question 3

what does a higher number mean on the Pauling scale?

Answer 3

means an element is better able to attract the bonding electrons.

Question 4

what is the most electronegative element?

Answer 4

Fluorine

Question 5

are the covalent bonds in diatomic gases polar or non-polar and why?

Answer 5

are non-polar because the atoms have equal electronegativities and so the electrons are equally attracted to both nuclei.

Question 6

in a covalent bond between two atoms of different electronegativities, the bonding electrons are pulled towards the more ?

Answer 6

electronegative atom, making the bond polar.

Question 7

In a polar bond the difference in electronegativity between the two atoms causes a ?

Answer 7

dipole

Question 8

what is a dipole?

Answer 8

is a difference in charge between the two atoms caused by a shift in electron density in the bond.

Question 9

if charge is distributed unevenly over a whole molecule, then the molecule will have a?

Answer 9

permanent dipole

Question 10

molecules that have a permanent dipole are called?

Answer 10

polar molecules