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Describe long form of periodic table?

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Describe long form of periodic table?

Posted by Aditya Kumar Arya 5 years, 5 months ago

CBSE > Class 10 > Science

1 answers

Meghna Thapar 5 years, 5 months ago

The modern or long form of the periodic table is based on the modern periodic law. The table is the arrangement of elements in increasing order of their atomic numbers. The modern periodic table is the present form of the periodic table. And it consists of 18 vertical columns and 7 horizontal rows.

Main features of long form of periodic table:

Groups. The vertical columns in the periodic table are known as groups. ...
Periods. There are 7 periods in the long form of periodic table. ...
Lanthanoids. Group of 14 elements in the sixth period. ...
Actinides. Group of 14 elements in the seventh period after actinium.

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