Describe mendeleev\'s periodic table?

1.	Describe mendeleev\'s periodic table?
Answer» \tElements are arranged in the periodic table in the increasing order of their relative atomic masses.\tMendeleev divided his periodic table in eight groups and seven periods.\tGroups from I to VII are meant for normal elements and group VIII is for transition elements.\tGroups from I to VII have been divided in two sub groups, while group VIII is meant for three elements.\tPeriods from 4th to 7th have been divided in two series: 1st series and 2nd series.\tElements having similar properties have been kept in the same group. For example; lithium, potassium, rubidium, etc. are in 1st group.

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