Chemistry Year 9

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  • Created by: Ella2001
  • Created on: 24-04-15 20:36
What are ALLOTROPES? How are diamond and graphite the same?
When an element has 2+ forms. Diamond and graphite are allotropes of carbon.
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Why can increasing the concentration of an acid increase the rate of a reaction? (collision theory)
There are more acid particles and less water particles in the same acid volume.
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What colour does lithium give in a flame test?
Bright Red
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What colour does sodium give in flame test?
Red/Yellow/Orange
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What colour does calcium give in a flame test?
Orangey-Red/Dark Red
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What colour does potassium give in a flame test?
Lilac/Pinky-Purple
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How is a flame test carried out?
Place crystals on a nichrome wire and put in blue flame on bunsen burner. Note flame colour.
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How is an Oxygen test carried out?
Put hydrogen peroxide in boiling tube. Light splint. Add maganese dioxide powder. Blow out splint until in glows, place gas in boiling tube.
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What is the only gas that turns indicator blue?
Ammonia
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What is the charge on a proton?
Positive (P for Proton)
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What is the charge on an electron?
Negative
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What is the charge on a neutron?
No charge
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How do the relative masses of protons, neutrons and electrons compare?
Electrons are lightest.
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What are isotopes?
When the atomic mass number has more than one value.
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How do you find the neutrons in an atom, via the periodic table?
Take away the atomic number from the atomic mass.
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What is diffusion?
The spreading of one set of particles through another until evenly mixed.
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Does Group 0 form ions?
No, they are already stable with a full outer shell.
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What type of bonding occurs when a metal reacts with a non-metal? Does it give or share?
Ionic bonding- gives.
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What type of bonding is it when 2 non- metals react? Giving or sharing?
Covalent bonding- sharing.
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Why are metals generally malleable?
Bonds are in layers, so they can slide over eachother.
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Why can metals conduct electricity?
Free electrons roam through ions.
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Why can ionic compounds conduct electricity when molten or in water, but not when solid?
The free electrons cannot move around in solids, so cannot conduct electricity.
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When testing for an Fe2+ ion, after adding sodium hydroxide, what do you look for?
Dark green precipitate.
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When testing for an Fe3+ ion, after adding sodium hydroxide, what do you look for?
Orangey Brown Colour.
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In testing for a Cu2+ ion, after adding sodium hydroxide, what do you look for?
Blue precipitate.
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How do you test for chlorine gas?
It bleaches indicator paper; Only gas that can.
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How do you test for Co2?
1cm hydrochloricacid in test tube, 1cm limewater in other. Pipette in Carbon dioxide gas. Squeeze into limewater. Limewater goes cloudy.
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What is the formula for:1:Carbonate ion 2: Sulphate ion 3: Chloride ion
1: CO32- 2: SO42 3: CI-
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Other cards in this set

Card 2

Front

Why can increasing the concentration of an acid increase the rate of a reaction? (collision theory)

Back

There are more acid particles and less water particles in the same acid volume.

Card 3

Front

What colour does lithium give in a flame test?

Back

Preview of the front of card 3

Card 4

Front

What colour does sodium give in flame test?

Back

Preview of the front of card 4

Card 5

Front

What colour does calcium give in a flame test?

Back

Preview of the front of card 5
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