chemistry unit 1

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nucleus
middle,pro&neu, positively charged
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electrons
move around nucle. negative, occupy shells
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number of protons=
number of electrons
3 of 59
elements consist of
one type of atom only
4 of 59
periodic table
puts elements with similar properties together
5 of 59
compounds
atoms join to make this
6 of 59
atoms arent
lost or made in chemical reactions
7 of 59
limestone is mainly
calcium carbonate
8 of 59
calcium oxide reacts with water to produce
calcium hydroxide
9 of 59
limestone is used to make
cement, mortar, concrete
10 of 59
limestone quarrying
makes a mess of landscape
11 of 59
ores contain
enough metal to make extraction worthwhile
12 of 59
metals are extracted from ores
chemically
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some metals can be extracted by
reduction with carbon
14 of 59
some metals are extracted by
electrolysis
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electrolysis
splitting up with electricity
16 of 59
copper is purified by
electrolysis
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extract copper from a solution by
displacement reaction
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copper rich ores are
in short supply
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recycling metals is
important as metal extraction is bad for the environment
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metals are
strong, bendy and great conductors
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metal's properties decide
how it's best used
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pure iron tends to be
too bendy
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most iron is converted into
steel- an alloy
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alloys
harder than pure metals
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bronze
copper+tin
26 of 59
cupronickel
copper+nickel
27 of 59
gold alloys
made for jewellery
28 of 59
aluminium alloys
used to make aircrafts
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crude oil
mix of hydrocarbons
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crude oil is split into
separate groups of hydrocarbons by fractionating column
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crude oil is mainly
alkanes- chains of carbon atoms surrounding hydrogen
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crude oil provides
important fuel for modern life
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crude oil isnt
environments best friend
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sulfur dioxide causes
acid rain
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reduce acid rain by
reducing sulfur emissions
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increasing carbon dioxide
causes climate change
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particles cause
global dimming
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alternative fuels are being developed. e,g
ethanol, hydrogen gas, biodiesel
39 of 59
cracking
splittinglongchain hydrocarbons by passing vapour over catalys
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alkenes have
c=c doublebond
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ethene can be reacted with steam to produce
ethanol
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ethanol can be produced from renewable resources
by fermentation
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alenes can be used to make polymers
polymerisation
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polymers are cheap, but
dont rot
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we can extract oils from plants by
distillation
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unsaturated oils contain
c=c double bonds
47 of 59
vegetable oils in foods can
affect health
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unsaturated oils can be
hydrogenated
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emulsions made from
oil and water
50 of 59
some foods contain emulsifiers to help
oil and water mix
51 of 59
wegener's theory
continental drift
52 of 59
wegener's theory wasn't belived because
geologists said- impossible. wild predictions, inaccurate data
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earth has
crust, mantle, outer and inner core
54 of 59
earth's surface is made up of
tectonic plates
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scientists cant predict
volcanoes and volcanic eruptions
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phase 1
volcanoes gave out gases
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phase 2
green plants evolved and produced oxygen
58 of 59
phase 3
ozone layer allows evolution of complex animals
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Other cards in this set

Card 2

Front

move around nucle. negative, occupy shells

Back

electrons

Card 3

Front

number of electrons

Back

Preview of the back of card 3

Card 4

Front

one type of atom only

Back

Preview of the back of card 4

Card 5

Front

puts elements with similar properties together

Back

Preview of the back of card 5
View more cards

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