<u><em>Answer:</em></u>
<em>Father of atomic theory?</em>
Dalton is the father of atomic theory who said that matter is composed of indivisible component.
<em>Discovery of electron by?</em>
J. J Thomson has discovered the electron by performing an experiment which contain negative charges.
<em>Who expressed particles by wave equations?</em>
Schrödinger expressed that particles have wave nature.
<em>Who researched on radioactivity?</em>
Madam Curie has researched over radioactivity.
<em>Who discovered the "open spaces" model?</em>
Rutherford discovered the "open spaces" model.
<em>Who applied quantum theory to atoms? </em>
Bohr has applied quantum theory to atom.
Hope this help.
