The long form of periodic table has

Eight horizontal rows and seven vertical columns

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Seven horizontal rows and eighteen vertical columns

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Seven horizontal rows and seven vertical columns

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Eight horizontal rows and eight vertical columns

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Solution

The correct option is B
Seven horizontal rows and eighteen vertical columns

As you can see, the periodic table has 18 groups and 7 periods as of now.

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The long form of periodic table has

Who developed the long form of periodic table?

The basis of long form of periodic table is:

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