1.1 bonding, structure and properties

Question 1

difference between ionic and covalent bonding

Answer 1

ionic gain or lose electrons whereas covalent share electrons

Question 2

what to remember when doing ionic bonding?

Answer 2

electron transfer
ionic charge

Question 3

describe giant ionic structure

Answer 3

giant 3D lattice arangement of positiva and negative ions

Question 4

giant ionic structure bonds

Answer 4

strong electrostatic attrations

Question 5

giant ionic structure melting pt

Answer 5

high because of strong electrostatic attractions

Question 6

giant ionic structure electrical conductor

Answer 6

only when molten or aqueous because ions are free to move in liquid

Question 7

giant ionic structure example

Answer 7

soidum chloride

Question 8

describe simple covalent structure

Answer 8

isolated molecules with weak van der waals attractions between molecules

Question 9

simple covalent structure bonds

Answer 9

strong bonds within molecules

Question 10

simple covalent structure melting pt

Answer 10

low because van der waals attractions make and break themselves

Question 11

simple covalent structure electrical conductor

Answer 11

never because no moving ions

Question 12

simple covalent structure example

Answer 12

iodine

Question 13

describe giant covalent diamond

Answer 13

repeating 3D structure where each atoms is attatched to 4 others

Question 14

giant covalent diamond bonds

Answer 14

super strong covalent bonds

Question 15

giant covalent diamond melting pt

Answer 15

incredibly high because hard to break super strong bonds

Question 16

giant covalent diamond electrical conductor

Answer 16

no because has no moving ions

Question 17

giant covalent diamond example

Answer 17

diamond

Question 18

describe giant covalent graphite

Answer 18

repeating 3D structure where each atom is joined to 3 others forming hexagons

Question 19

giant covalent graphite bonds

Answer 19

super strong bonds, weak intermolecular van der waals attractions between layers

Question 20

giant covalent graphite melting pt

Answer 20

high because super strong bonds

Question 21

giant covalent graphite electrical conductor

Answer 21

excellent conductor

Question 22

giant covalent graphite additional property

Answer 22

slippery as layers can move on top of each other

Question 23

giant covalent graphite use

Answer 23

lubricant

Question 24

describe giant covalent fullerenes - carbon nanotubes

Answer 24

repeating 3D structure where each atoms is joined to 3 others forming one layer of hexagons rolled into a tube

Question 25

giant covalent fullerenes - carbon nanotubes bonds

Answer 25

super strong

Question 26

giant covalent fullerenes - carbon nanotubes melting pt

Answer 26

high because super strong bonds to break

Question 27

giant covalent fullerenes - carbon nanotubes electrical conductor

Answer 27

excellent conductor, lots of delocalised electrons

Question 28

giant covalent fullerenes - carbon nanotubes additional properties

Answer 28

low density as tube is hollow

Question 29

giant covalent fullerenes - carbon nanotubes use

Answer 29

drug delivery

Question 30

describe giant covalent fullerenes - bucky balls

Answer 30

repeating 3D spherical shaped structure

Question 31

giant covalent fullerenes - bucky balls bonds

Answer 31

super strong

Question 32

giant covalent fullerenes - bucky balls melting pt

Answer 32

high because super strong bonds to break

Question 33

giant covalent fullerenes - bucky balls electrical conductor

Answer 33

excellent conductor

Question 34

giant covalent fullerenes - bucky balls additional property

Answer 34

low density because cage structure is hollow

Question 35

giant covalent fullerenes - bucky balls use

Answer 35

minature electronics

Question 36

describe giant covalent graphene

Answer 36

repeating 3D structure where one atom is joined to 3 others forming one layer of hexagons

Question 37

giant covalent graphene bonds

Answer 37

super strong

Question 38

giant covalent graphene melting pt

Answer 38

high because strong bonds to break

Question 39

giant covalent graphene electrical conductor

Answer 39

excellent conductor, lots of delocalised electrons

Question 40

giant covalent graphene additional property

Answer 40

low density because one layer

Question 41

giant covalent graphene use

Answer 41

phone screens

Question 42

describe metallic structures

Answer 42

positive metal ions surrounded by sea of delocalised electrons

Question 43

metallic structures bonds

Answer 43

stromg sttraction between ions

Question 44

metallic structures melting pt

Answer 44

high because strong attractions

Question 45

metallic structures electrical conductor

Answer 45

conducts electricity because delocalised electrons

Question 46

metallic structures example

Answer 46

sodium

Question 47

why can nano particles be significant in the world of science?

Answer 47

when an element is turned doen into nano form from its 'bulk' material its properties can be completely different making them more relevant

Question 48

why is a nano particles properties different than the elements 'bulk' form?

Answer 48

increased surface area

Question 49

nano silver property and use

Answer 49

antibacterial and microbe killing properties antiseptic sprays and coating of appliances

Question 50

titanium dioxide property and use

Answer 50

hydrophobic and can reflect and abrob UV light self cleaning glass and sunscreen

Question 51

advantages of nanotechnology

Answer 51

Potential innovations due to new relevant properties

Question 52

disadvantages of nanotechnology

Answer 52

potential risk of disease when abrosbed into skin or inhaled inflaming lungs

Question 53

what is a smart material

Answer 53

material that can change its visual or physical properties depending on its environment

Question 54

can smart material changes be reversible?

Answer 54

yes

Question 55

thermochromic paint propery and use

Answer 55

can change colour when heated thermometer

Question 56

photochromic paint propery and use

Answer 56

changes colour on exposure to light sunglasses

Question 57

spahe memory alloy propery and use

Answer 57

regains original shape when heated car bodies