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Card 6

Front

What was the first good effort?

Back

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Card 7

Front

Who created Newlands' law?

Back

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Card 8

Front

What did Newlands notice?

Back

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Card 9

Front

The set of eight was called what?

Back

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Card 10

Front

Why did the pattern break down on the third row?

Back

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Card 11

Front

Newlands' ideas were presented to the chemical society in 1865, so why was his work criticised?

Back

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Card 12

Front

Who left gaps and predicted new elements?

Back

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Card 13

Front

What did Mendeleev do in 1869?

Back

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Card 14

Front

Mendeleev put the elements in order of what?

Back

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Card 15

Front

Why did he leave gaps?

Back

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