Question

name the scientist who explain isotopes and atomic no. for the first time​

Answer 1

Answer:

Frederick Soddy

The existence of isotopes was first suggested in 1913 by the radiochemist Frederick Soddy, based on studies of radioactive decay chains that indicated about 40 different species referred to as radioelements (i.e. radioactive elements) between uranium and lead, although the periodic table only allowed for 11 elements ...