Question

दरूदशनय का हंगामा इस प्रिषय

पर तनबंि ललखखए I​

Answer 1

Answer:

modern periodic law and the present form of predictable we must be had in mind that when medal develops is the predictable chemist knew nothing about the internal structure of atom however the beginning of the 20th century witnessed a profound developed in theories about subatomic particles in in 1913 the English physicist Henry moseley observed regularities in the characteristics re expectra of the elements