Class 11ChemistryClassification of Elements and Periodicity in PropertiesExtended or long form of periodic table
EasyThe long form of the periodic table has:
- AEight horizontal rows and seven vertical columns
- BSeven horizontal rows and eighteen vertical columns
- CSeven horizontal rows and seven vertical columns
- DEight horizontal rows and eight vertical columns
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What is the main basis for the arrangement of elements in the modern periodic table? Describe it.
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Who developed the long form of periodic table?
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