Question

a) Give the general idea of Dobernier triads with two examples
b) State Mendeleev's Periodic Law and give its defects
c) An element has atomic number 17 and has mass no 37.
Draw its orbital structure and state the position of X the periodic table​

Answer 1

Answer:

1) Doberainer triad are the element arranged three elements with increasing number of atomic masses

the atomic mass of middle element is equal to the the mean of atomic masses of other two element

2) Mendeleev's periodic law are