Polarity

Question 1

when do polar bonds occur?

Answer 1

when difference in electronegativities of atoms so more electronegative atom exerts greater pulling power on shared electron pair

Question 2

What is a polar bond also?

Answer 2

unsymmetrical

Question 3

dipole

Answer 3

term indicates that this type of bond has two separated opposite electric charges

Question 4

pure covalent

Answer 4

equal sharing of electrons

Question 5

What does the polarity of a molecule depend on?

Answer 5

polar bonds it contains

way in which polar bonds are oriented (i.e. shape of molecule)

Question 6

When will charges from polarity cancel out?

Answer 6

if bonds are of equal polarity (involve same elements) and arranged symmetrically charges oppose and cancel out

Question 7

net dipole moment

Answer 7

if molecule contains bonds of different polarity or are asymmetrically arranged dipoles will not cancel out

Question 8

permanent dipole

Answer 8

permanent separation of charge within bonds as result of difference in electronegativity between bonded atoms in polar molecules

Question 9

dipole-dipole attraction

Answer 9

attraction between opposite charges on neighbouring molecules

Question 10

electron domain

Answer 10

number of lone pairs or bond locations around a particular atom in a molecule

Question 11

trend in melting/boiling points in polar compounds

Answer 11

higher than non-polar

dipole-diple generally stronger than london forces

Question 12

solubility of polar compounds

Answer 12

soluble in polar solvents

Question 13

van der Waals’ forces

Answer 13

all forces between molecules that do not involve electrostatic attractions between ions or bond formation

Question 14

Where do dipole-induced dipole attractions occur?

Answer 14

between different molecules