GCSE Chemistry Unit 3-The Early Periodic Table

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  • Created by: Heather
  • Created on: 08-05-14 18:53
Who was the first English scientist who created a periodic table?
John Newlands
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What Law did Newlands put forward for his table?
Law of Octaves
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How did Newlands arrange and order the elements?
By relative atomic mass
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What was the pattern he found among earlier elements?
Each element was similar to the element eight places ahead of it,
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What was the problem with Newlands ordering elements by atomic mass?
Newlands was forced to put some elements into groups that didn't match their properties so broke the periodic pattern of properties,
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As Newland put elements together which didn't have similar chemical properties, what did other scientists think of his table?
His table was not accepted by other scientists,
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Who was the next Russian Chemist to put forward a periodic table?
Dmitri Mendeleev,
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How did Mendeleev arrange the elements in his table?
By relative atomic mass,
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When arranging elements, what did Mendeleev leave? Why?
He left gaps in his periodic table for undiscovered elements,
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What did these gaps allow him to do with the missing elements? Was he right?
The gaps allowed him to predict the missing elements and their properties and he was right,
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When Mendeleev predicted the unknown elements and was right, what did scientists think of his table?
Scientists accepted his table and used it as a useful tool,
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What did Mendeleev do, other than leave gaps for elements, that made his table more accepted?
He swapped the order of some elements if it suited their properties more
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Other cards in this set

Card 2

Front

What Law did Newlands put forward for his table?

Back

Law of Octaves

Card 3

Front

How did Newlands arrange and order the elements?

Back

Preview of the front of card 3

Card 4

Front

What was the pattern he found among earlier elements?

Back

Preview of the front of card 4

Card 5

Front

What was the problem with Newlands ordering elements by atomic mass?

Back

Preview of the front of card 5
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