Unit 1- Structure And Bonding

Question 1

What bond does two elements with the same electronegativities form

Answer 1

Pure covalent/ non-polar covalent

Question 2

What bonding does two non metals with slightly different electronegativities form

Answer 2

Polar covalent

Question 3

What bond does two elements with very large electronegativities form

Answer 3

Ionic

Question 4

What are ionic bonds usually formed of

Answer 4

A metal and non metal

Question 5

What is an ionic bond

Answer 5

The electrostatic force of attraction between a metal ion and non metal ion

Question 6

Describe the bonding continuum

Answer 6

Pure/non-polar covalent
Polar covalent
Ionic

Question 7

Describe elements with ionic bonding’s mp and conductivity

Answer 7

High mp

Conducts when molten or in a solution

Question 8

What are the forces between molecules called

Overall name

Answer 8

Intermolecular

Question 9

How many types of Van Der Waals forces are there

Answer 9

Three

Question 10

What is the weakest of all Van Der Waals forces

Answer 10

London dispersion forces

Question 11

LDF are found in monatomic elements and molecular elements

True or false

Answer 11

True

Question 12

What are LDFs caused by

Answer 12

An uneven distribution of electrons within an atom

Question 13

What is a dipole

Answer 13

A term used to describe molecules which unequal distribution of charge results in one side of the molecule becomes slightly positively charged and the other side becomes slightly negatively charged

Question 14

What is a polar molecule

Answer 14

A molecule with a permanent dipole

Question 15

For a molecule to be positive what are the two conditions

Answer 15

Must have polar covalent bonds

Must be able to draw a line through it so on one side it is positively charged and the other side is negatively charged

Question 16

What are the intermolecular forces between non polar molecules

Answer 16

Weak LDF

Question 17

What intermolecular forces between polar molecules

Answer 17

Stronger permanent dipole - permanent dipole

Question 18

What are permanent dipole - permanent dipole attractions

Answer 18

Electrostatic forces of attraction between the permanent dipole of a polar molecule and the permanent dipole of its neighbour

Question 19

What is stronger permanent dipole- permanent dipole or LDF

Answer 19

Permanent dipole- permanent dipole

Question 20

What is hydrogen bonding

Answer 20

Usually strong permanent dipole- permanent dipole interactions that arise between highly polar molecule

Question 21

Which atoms are associated with hydrogen bonding

Answer 21

Nitrogen
Oxygen
Fluorine
Hydrogen

Question 22

What are the two factors which affect the mp and bp of a substance

Answer 22

Type of Van Der Waals bonding present

Total number of elections in a molecule

Question 23

What is stronger hydrogen bonding or permanent dipole - permanent dipole

Answer 23

Hydrogen bonding

Question 24

What is viscosity

Answer 24

How thick I liquid is

Question 25

Describe a highly viscous liquid

Answer 25

Treacle | Syrup

Question 26

Describe a liquid with a low viscosity

Answer 26

Water

Question 27

The stronger the intermolecular forces the ......... the viscosity

Answer 27

Greater

Question 28

What types of substances are polar molecules likely to dissolve in

Answer 28

Polar liquids

Question 29

What liquids are non polar molecules liked to dissolve in

Answer 29

Non polar liquids

Question 30

Are ionic compounds soluble in polar or non polar liquids

Answer 30

Polar liquids

Question 31

What is the layer formed between a polar and non polar liquid

Answer 31

Immiscible layer

Question 32

What must a substance contain in order for it to conduct

Answer 32

Charged particles that are free to move | Electrons or ions

Question 33

What happens to the density of substances other than water when they change from liquid to solid

Answer 33

Increase in density

Question 34

What is the intermolecular bonding in ice

Answer 34

Hydrogen bonding

Question 35

What is the density of ice compared to water

Answer 35

Less dense

Question 36

Why is ice less dense than water

Answer 36

The hydrogen bonds lock molecules together into a lattice of hexagonal rings leaving lots of empty spaces between the molecules