AQA C3 Chapter 1 - The development of the periodic table

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Group
A vertical division of the periodic table containing elements with similar chemical properties.
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Period
A horizontal division of the periodic table.
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John Newlands
A British chemist who arranged the elements according to his 'Law of Octaves'.
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Dmitri Mendeleev
A Russian chemist who arranged the elements in their modern arrangement.
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Transition Metals
The large block of elements in the centre of the periodic table with similar properties.
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Electronic structure
The arrangement of the electrons in an atom.
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Alkali metals
Group 1 of the Periodic Table. Soft, silvery metals with low densities and low melting and boiling points.
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Catalyst
A substance that increases the rate of a chemical reaction but does not get used up in the process.
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Halogens
The elements of group 7 of the periodic table.
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Diatomic molecules
A molecule consisting of two atoms joined by a covalent bond. All of the halogens form diatomic molecules.
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Displacement reaction
A reaction in which a more reactive element displaces a less reactive one.
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Other cards in this set

Card 2

Front

A horizontal division of the periodic table.

Back

Period

Card 3

Front

A British chemist who arranged the elements according to his 'Law of Octaves'.

Back

Preview of the back of card 3

Card 4

Front

A Russian chemist who arranged the elements in their modern arrangement.

Back

Preview of the back of card 4

Card 5

Front

The large block of elements in the centre of the periodic table with similar properties.

Back

Preview of the back of card 5
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