Chemistry Chapter 3 (Complete)
- Created by: Annabel Osman
- Created on: 24-02-16 20:28
Who created the first periodic table in 1808?
John Dalton
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What did John Lewlands Law say?
That every 8th element had similar properties
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In 1869, Mendeleev produced the modern periodic table, what did it allow for?
Undiscovered elements
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Why was Mendeleev's periodic table not accepted at first?
Because the structure of the atom was not fully understood
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Large atoms lose electrons...
easily
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As size increases down the group, it is...
less reactive, hard to gain electrons
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As size increases down the group, there is...
more attraction from nucleus, easy to lose electrons
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Alkali metals are soft metals with 1 valance electron?
True
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When metals react with water...
hydrogen and a metal hydroxide are produced
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Transition metals (group 3) are...
strong, hard, high melting and boiling points
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What colour compound does Copper (II) Sulfate produce?
Blue
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What colour compound does Iron (II) Sulfate produce?
Green
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What colour compound does Iron (III) Sulfate produce?
Brown
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What is the alloy of steel made of?
Iron and Carbon
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Halogens are the most reactive non-metals?
True
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Which dissolved compounds does hard water contain?
Ca and Mg
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What does hard water produce when heated?
Scale
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Why is hard water good for you?
It protects the bones and teeth
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How is hard water treated?
By adding chlorine and filtering
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What is the name of the feature which removes ions such as Ca, Mg, Cu, Al and Pb from hard water?
Ion-exchange resin
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Why is chlorine added to hard water?
To sterilise by killing microbes
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Advantage of fluorine?
Improve dental health
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Disadvantage of fluorine?
Fluorosis
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Which is the correct equation to calculate energy change?
Q = mc ΔT
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When forming bonds, energy is...
released (exothermic)
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When breaking bonds, energy is...
absorbed (endorthermic)
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What is the flame test used to identitfy?
Group 1 and 2 metals
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What is the loop used in the flame test made of?
Nichrome
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What colour flame does lithium create?
Crimson
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What colour flame does sodium create?
Yellow
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What colour flame does potassium create?
Lilac
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What colour flame does calcium create?
Brick red
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What colour flame does barium create?
Green
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Al, Ca and Mg form a white precipitate when what is added?
Sodium hydroxide
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Which ions does this test identitfy? Add dilute acid, then do limewater test
Carbonates
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Which ions does this test identitfy? Add dilute nitric acid
Halides
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Which ions does this test identitfy? Add dilute hydrochloric acid then add barium chloride solution?
Sulfates
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The point at which the acid/alkali reaction is complete is called the...
end point
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Equilibrium is when the rate of forward reaction equals the rate of reverse reaction?
True
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When you increase pressure...
Equilibrium shifts to decrease pressure
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When you increase pressure...
Equilibrium shifts in the direction of fewer molecules
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When you decrease pressure...
Equilibrium shifts in the direction of most molecules
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When you decrease pressure...
Equilibrium shifts to increase pressure
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When you increase temperature...
Equilibrium shifts to decrease temperature (favour endo)
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When you decrease temperature...
Equilibrium shifts to increase temperature (favour exo)
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What temperature and pressure is needed for the Haber process?
450°C and 200 atmospheres pressure
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Other cards in this set
Card 2
Front
What did John Lewlands Law say?
Back
That every 8th element had similar properties
Card 3
Front
In 1869, Mendeleev produced the modern periodic table, what did it allow for?
Back
Card 4
Front
Why was Mendeleev's periodic table not accepted at first?
Back
Card 5
Front
Large atoms lose electrons...
Back
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