C3: The Periodic Table

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  • Created by: Callum
  • Created on: 11-04-14 14:52
What did Newlands fail to realise?
That there were still undiscovered elements
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How did Newlands arrange the elements?
In order of their atomic mass
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What did Mendeleev do in his periodic table?
He left gaps for the discovery of new elements
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What would tell you 2 elements would have similar properties?
Same number of electrons in outer shell
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What is a trend?
A pattern in reactivity
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Why do alkali metals become more reactive as you go down the group?
Because an electron is lost more easily
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Why do halogens become less reactive going down the group?
Because an electron is gained less easily
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Give the name for elements in group 1.
The alkali metals
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Give the name for elements in group 7.
The halogens
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Alkali metals have _____ melting and boiling points going down the group.
lower
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Why are alkali metals stored under oil?
Because they react vigourously with oxygen and water.
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What is produced when alkali metals react with water?
A metal hydroxide + hydrogen
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What happens when a metal hydroxide is dissolved in water?
An alkaline solution is formed
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What do transition metals form?
Coloured compounds
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Transition metals can be used to speed up reactions. What is the word for this?
A catalyst
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Transition metals have _______ densities and __________ melting points than Group 1 metals.
Higher, higher
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Are transition metals more or less reactive than Group 1 metals?
Less reactive (don't need to be stored in oil)
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Halogens travel round in...
twos
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The halogens melting and boiling points ______ as you go down the group.
Increase
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What is produced when halogens react with metals?
Ionic salts (e.g. Lithium Chloride)
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What is produced when a halogen reacts with other metallic elements?
Molecular compounds (e.g. Hydrogen Chloride)
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What happens if one atom is more reactive than another?
A displacement reaction will occur
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True or false. Chlorine will displace both bromine and iodine.
True. This is because Chlorine is more reactive than bromine and iodine.
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Other cards in this set

Card 2

Front

How did Newlands arrange the elements?

Back

In order of their atomic mass

Card 3

Front

What did Mendeleev do in his periodic table?

Back

Preview of the front of card 3

Card 4

Front

What would tell you 2 elements would have similar properties?

Back

Preview of the front of card 4

Card 5

Front

What is a trend?

Back

Preview of the front of card 5
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