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chemistry > C1 > Flashcards

C1 Flashcards

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1
Q

isotopes have ____ number of protons and _____ number of neutrons

A

same different

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2
Q

relative atomic mass is

A

average mass taking into account masses and abundance’s of all isotopes

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3
Q

what is a mixture

A

not chemically bonded substance

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4
Q

what ways was the periodic table sorted

A

physical and chemical properties

atomic weight

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5
Q

in ____ dimitri mendeleev overcame some problems by placing ___ known elements and arranging them into a ____ of elements

A

1869
50
table

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6
Q

dimitri left ____ to make sure elements with ____ properties stayed in the same groups

A

gaps

similar

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7
Q

how is the modern periodic table arranged

A

increasing proton number

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8
Q

properties of metals

A 
strong
malleable
conductors of heat + electricity
high boil and melt
shiny
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9
Q

properties of non metals

A

dull
brittle
don’t conduct
low density

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10
Q

group 1 properties

A

soft
low density
1 electron outer shell

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11
Q

what happens as you go down group 1

A

increasing reactivity, and boiling and melting points

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12
Q

group 7 exist in ___

A

pairs

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13
Q

what happens as you go down group 7

A

decreasing reactivity

higher points

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14
Q

what are ions

A

charged particles when electrons are transferred

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15
Q

what is ionic bonding

A

transfer of electrons

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16
Q

when atoms lose or gain electrons theyre ___ attracted due to _____ forces

A

strongly

electrostatic

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17
Q

giant ionic ____

A

lattice

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18
Q

properties of ionic compounds

A

strong electrostatic forces
dissolve easily
not conductive

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19
Q

what is the empirical formula

A

balanced number of atoms in a compound

20
Q

what is covalent bonding

A

sharing of electrons

non metals

21
Q

positive of dot and cross

A

which atoms electrons come from

22
Q

negative of dot and cross

A

don’t show size

arrangement

23
Q

displayed formula +

A

how they are connected

24
Q

displayed formula -

A

don’t show 3D model

25
Q

3D model +

A

arrangement

26
Q

3D model -

A

confusing

27
Q

simple molecular substance properties

A 
strong covalent bonds
attraction = weak
melt = break intermolecular 
gas or liquid 
bigger = stronger forces 
don’t conduct
28
Q

what is a polymer

A

long chains of repeating units

29
Q

allotrope

A

different structural forms of the same element in same physical state

30
Q

name carbon allotropes

A

diamond
graphite
graphene
fullerene

31
Q

diamond properties

A

giant
saturated
needs lots of energy
doesn’t conduct

32
Q

graphite properties

A

3 covalent bonds
no bonds between layers
soft and slippery
conducts

33
Q

graphene properties

A

hexagonal shapes
2D
strong and light
delocalised electrons

34
Q

fullerenes are

A

molecules made of carbon shaped like closed tubes or hollow balls

35
Q

buckminsterfullerene formula

A

C60

36
Q

buckminsterfullerene shapes

A

20 hexagons

12 pentagons

37
Q

buckminsterfullerene uses

A

deliver drug
lubricant
nanotubes
catalysts

38
Q

nanotube properties

A

high length : diameter
conduct
tensile strength
light

39
Q

metallic bonding properties

A

electrostatic attraction is strong
delocalised electrons
regular structure

40
Q

what happens when alloys are made

A

different sized atoms distort layers

41
Q

mole definition

A

and amount of substance with avogadros constant number of particles

42
Q

abogadros constant

A

6.02 x 10^23

43
Q

a mole is equal to

A

Ar or Mr

44
Q

if mass changes in a reaction

A

gas involved

45
Q

ionic bonding is a strong _______ attraction

A

electrostatic

chemistry (10 decks)

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