Why is the organization of the periodic table by physical properties not very useful?

It shows no regular pattern

Explanation:

Physical properties of an element are those we can observe and feel with our senses. Also, the use special equipment can enhance our perception of these properties.

The same physical property can be shared different number elements. On the periodic table, all the elements in group 1 and 2 are metals. This is not very useful for scientists whose emphasis is to distinguish one atom from the other. Therefore, physical properties are highly limited in the organization of the periodic table.

m=9

step-by-step explanation:

7m+8=71 subtract   8 from 71 which is 63 than divide it by 7m   equal 9.