CBSE Class 10 Science 2022 · Paper 31/4/2 · Question 7
State Modern Periodic Law. How many rows and columns are there in the Modern Periodic Table ?
Answer
Properties of elements are a periodic function of their atomic number; the table has 7 rows (periods) and 18 columns (groups).
Modern Periodic Law: the properties of elements are a periodic function of their atomic number.
The Modern Periodic Table has 7 horizontal rows, called periods, and 18 vertical columns, called groups.
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