Question

State the modern periodic table..​

Answer 1

Explanation:

Modern Periodic Law

The modern periodic law states that the physical and chemical properties of the elements are the periodic functions of their atomic numbers.

Scientists arranged elements in increasing order of their atomic numbers from left to right across each row. And discovered that the elements having similar properties repeat after regular intervals.

Why atomic number and not atomic mass?

Atomic mass is the total mass of the protons and neutrons present in a nucleus of an atom. Whereas, the atomic number is the number of protons in a nucleus. Also, the number of protons in the nucleus is equal to the electrons present outside the nucleus.

Answer 2

Modern Periodic Table is based on the Modern Periodic Law which states that “The physical and chemical properties of the elements are the periodic function of their atomic numbers”. The elements are arranged in order of increasing atomic numbers in horizontal rows called periods and vertical columns called groups.