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| 1. |
WhichimportantpropertydidMendeleev use toclasify the elements in hisperiodictableand didhe stick tothat ? |
| Answer» SOLUTION :Mendeleevusedatomicweightas thebasisof classification ofelementsin theperiodictable. He arrangedthe thenknownelementsin ORDEROF increasingatomicweigths groupingtogetherelements notknownat THATTIME. Forexamplethe ELEMENT galliumafteraluminiumandgermanium aftersilicon werenot known at thetimeMendeleevpreparedhisperiodictable. He calledtheseelementsas EKA- aluminium and ekasilicon. Latertheseelementswerediscoveredand theirpropertieswerefound to besimilarto thosepredictedby Mendeleev. | |