Question

Explain clearfy groups and periods in the modern periodic table

Answer 1

Answer:

In the periodic table , the elements are classified into groups and periods .

Groups :

The vertical columns in which the elements of that column will have similar

properties and similar outer shell configuration .

Periods :

The horizontal rows in which the elements are arranged in the increasing

order of their atomic numbers .

There are currently 7 periods and 18 groups in the modern periodic table .

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Answer 2

See top one answer this answer correct