Statement 1: Half-life of a certain radioactive element is 100 days. After 200 days, fraction left undecayed will be 50%

Statement 2:  , where symbols have usual meaning.

Statement 1: According to classical theory, the proposed path of an electron in Rutherford atom model will be parabolic

Statement 2: According to electromagnetic theory an accelerated particle continuously emits radiation

Statement 1: Energy is released in nuclear fission

Statement 2: Total binding energy of the fission fragments is larger than the total binding energy of the parent nucleus

Statement 1: Amongst alpha, beta and gamma rays, particle has maximum penetrating power

Statement 2: The alpha particle is heavier than beta and gamma rays

Statement 1:  undergoes  decays, decays and  decays and the daughter product is 

Statement 2: In decay the mass number decreases by 4 and atomic number decrease by 2. In decay the mass number remains unchanged, but atomic number increases by 1 only

Statement 1: Balmer series lies in the visible region of electromagnetic spectrum.

Statement 2:   where 

Statement 1: The positively charged nucleus of an atom has a radius of almost 

Statement 2: In -particle scattering experiment, the distance of closest approach for  particles is  

Statement 1: The binding energy per nucleon, for nuclei with atomic mass number , decreases with

Statement 2: The nuclear forces are weak for heavier nuclei

Statement 1:   represents fusion.

Statement 2: The above case is a  decay.