Question

1 state Mendelév s periodic law. How is it changed in Modern periodic table? What is the reason for the change? 2. The first periodic table has 2 element. The second period hes 6 elements.How are these numbers related to the total number of electrons in k and L shells of the electronic configuration? s​

Answer 1

ANS 1. PROPERTIES OF ELEMENTS ARE PERIODIC FYNCTION OF THEIT ATOMIC MASES

ANS 2.THE ATOMIC NUMBER IS CONSIDERED THAN ATOMIC MASS;REASON CONSIDER THE DEMERITS OF MENDELEV PEREODIC TABLE

3.WHILE GOING DOWN A GROUP I.E THE PERIOD CHANGES , A NEW SHELL IS ADDED.FOR E.G. IF HYFROGEN HAS 1 THAN LITHIUM BELOW IT WILL HAVE 3 CUZ 2 ELECTRONS IN 1ST SHELL AND 1 IN THE OTHER