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10 Cards in this Set
- Front
- Back
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How many elements were known in 1864 |
63 , many still undiscovered |
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How did new lands arrange the periodic table |
Atomic weight |
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What did newlands notice |
Periodicity |
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Who put the periodic table together first and what year? |
John newlands 1864 |
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Who realised some elements still had to be discovered? |
Dimitri Mendeleev |
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When did Mendeleev create his table and what did he do. |
1868 , he left gaps and reordered elements. |
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How were metals placed in groups |
Each element was placed in a group with elements of similar properties |
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What did Mendeleev use his table to do? |
Predict the existence and properties of new elements. |
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What happened when subatomic particles were discovered. |
It revealed that Mendeleev had organised the elements in order of increasing atomic number |
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How are alkali metals stored and why? |
Under oil because they react vigorously with oxygen,water including air moisture. |
