Question

How many rows and columns are there in the modern periodic table

Answer 1

Answer:

there are 7 horizontal rows which are known as periods . And 18 vertical columns.

Answer 2

The number of rows in the modern periodic table is 7 and that of columns is 18.

• The modern periodic table was created by Mosley.
• There are 7 horizontal rows which are called periods. They are also called series.
• Also, the modern periodic table consists of 18 vertical columns which are called groups.

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