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Chemistry UNIT 2 > 1.1 bonding, structure and properties > Flashcards

1.1 bonding, structure and properties Flashcards

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1
Q

difference between ionic and covalent bonding

A

ionic gain or lose electrons whereas covalent share electrons

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2
Q

what to remember when doing ionic bonding?

A

electron transfer
ionic charge

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3
Q

describe giant ionic structure

A

giant 3D lattice arangement of positiva and negative ions

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4
Q

giant ionic structure bonds

A

strong electrostatic attrations

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5
Q

giant ionic structure melting pt

A

high because of strong electrostatic attractions

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6
Q

giant ionic structure electrical conductor

A

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

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7
Q

giant ionic structure example

A

soidum chloride

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8
Q

describe simple covalent structure

A

isolated molecules with weak van der waals attractions between molecules

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9
Q

simple covalent structure bonds

A

strong bonds within molecules

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10
Q

simple covalent structure melting pt

A

low because van der waals attractions make and break themselves

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11
Q

simple covalent structure electrical conductor

A

never because no moving ions

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12
Q

simple covalent structure example

A

iodine

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13
Q

describe giant covalent diamond

A

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

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14
Q

giant covalent diamond bonds

A

super strong covalent bonds

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15
Q

giant covalent diamond melting pt

A

incredibly high because hard to break super strong bonds

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16
Q

giant covalent diamond electrical conductor

A

no because has no moving ions

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17
Q

giant covalent diamond example

A

diamond

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18
Q

describe giant covalent graphite

A

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

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19
Q

giant covalent graphite bonds

A

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

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20
Q

giant covalent graphite melting pt

A

high because super strong bonds

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21
Q

giant covalent graphite electrical conductor

A

excellent conductor

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22
Q

giant covalent graphite additional property

A

slippery as layers can move on top of each other

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23
Q

giant covalent graphite use

A

lubricant

24
Q

describe giant covalent fullerenes - carbon nanotubes

A

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

25
Q

giant covalent fullerenes - carbon nanotubes bonds

A

super strong

26
Q

giant covalent fullerenes - carbon nanotubes melting pt

A

high because super strong bonds to break

27
Q

giant covalent fullerenes - carbon nanotubes electrical conductor

A

excellent conductor, lots of delocalised electrons

28
Q

giant covalent fullerenes - carbon nanotubes additional properties

A

low density as tube is hollow

29
Q

giant covalent fullerenes - carbon nanotubes use

A

drug delivery

30
Q

describe giant covalent fullerenes - bucky balls

A

repeating 3D spherical shaped structure

31
Q

giant covalent fullerenes - bucky balls bonds

A

super strong

32
Q

giant covalent fullerenes - bucky balls melting pt

A

high because super strong bonds to break

33
Q

giant covalent fullerenes - bucky balls electrical conductor

A

excellent conductor

34
Q

giant covalent fullerenes - bucky balls additional property

A

low density because cage structure is hollow

35
Q

giant covalent fullerenes - bucky balls use

A

minature electronics

36
Q

describe giant covalent graphene

A

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

37
Q

giant covalent graphene bonds

A

super strong

38
Q

giant covalent graphene melting pt

A

high because strong bonds to break

39
Q

giant covalent graphene electrical conductor

A

excellent conductor, lots of delocalised electrons

40
Q

giant covalent graphene additional property

A

low density because one layer

41
Q

giant covalent graphene use

A

phone screens

42
Q

describe metallic structures

A

positive metal ions surrounded by sea of delocalised electrons

43
Q

metallic structures bonds

A

stromg sttraction between ions

44
Q

metallic structures melting pt

A

high because strong attractions

45
Q

metallic structures electrical conductor

A

conducts electricity because delocalised electrons

46
Q

metallic structures example

A

sodium

47
Q

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

A

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

48
Q

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

A

increased surface area

49
Q

nano silver property and use

A

antibacterial and microbe killing properties
antiseptic sprays and coating of appliances

50
Q

titanium dioxide property and use

A

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

51
Q

advantages of nanotechnology

A

Potential innovations due to new relevant properties

52
Q

disadvantages of nanotechnology

A

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

53
Q

what is a smart material

A

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

54
Q

can smart material changes be reversible?

A

yes

55
Q

thermochromic paint propery and use

A

can change colour when heated
thermometer

56
Q

photochromic paint propery and use

A

changes colour on exposure to light
sunglasses

57
Q

spahe memory alloy propery and use

A

regains original shape when heated
car bodies

Chemistry UNIT 2 (2 decks)

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