Question

write the modern periodic law. how do change the metalic properties in the periods and groups ​

Answer 1

Answer:

The modern periodic law states that the physical and chemical properties of the elements are the periodic function of the atomic numbers. The various elements with similar properties repeat after certain regular intervals.

Explanation:

Answer 2

Explanation:

its proposed by Henry Moseley .. it's based on atomic number .. therefore the position of hydrogen ..isotope .. etc

. therefore.. the column represent group and rows represent the periods

..