Question

what was the basis of arranging element in modern periodic law

Answer 1

Elements are arranged on the basis of increasing order of atomic numbers. The horizontal rows in the periodic table are called Periods and the vertical columns are known as the Groups. The elements in the Modern Periodic Table are arranged in 7 Periods and 18 Groups.

Answer 2

Answer:

in the periodic table elements are arranged

Explanation:

in the periodic table elements are are arranged on the basis of increasing order of atomic numbers. in the periodic table elements are arranged in rows and columns. each row is called a period there are 7 periods and 18 vertical columns in the periodic table this column are divided into 8 group which are represented bye Roman numbers.