discuss the important features of modern periodic table
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1
Answer:
1. It comprises periods and groups.
2. Metals are kept in left side; non metals in right side; transition elements in middle
3. Atomic size and metallic character increases down the group and decreases across the period.
Elements are arranged according their atomic no.
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2
Answer:
It is based on atomic number
It gives the isotopes correct position that is in the element block
It has given position to hydrogen (even still it is doubt full )
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