DEFINE THE FOLLOWING.
1) Mendeleev’s Periodic table.
2) Dobereiner’s Triads
3) Group.
4) Periodic.
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4 or 1 OK note this point here my friend
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1.Mendeleev's periodic law states that; The physical and chemical properties of elements are a periodic function of their atomic weights.
2.Dobereiner’s triads and Newland’s law of octaves were early attempts at classifying elements into groups based on their properties.
3.In chemistry, a group is a column of elements in the periodic table of the chemical elements. There are 18 numbered groups in the periodic table; the f-block columns are not numbered.
4. A period in the periodic table is a row of chemical elements. All elements in a row have the same number of electron shells.
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