Question

Answer the following questions​

Answer 1

Answer:

A period is a horizontal row of the periodic table. There are seven periods in the periodic table, with each one beginning at the far left. ... A group is a vertical column of the periodic table, based on the organization of the outer shell electrons. There are a total of 18 groups

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Answer 2

Answer:

There are 18 vertical columns in periodic table called groups.

There are 7 horizontal rows in periodic table called periods.