Answer : Option 1) nuclei of  and nuclei of
 and nuclei of  only.
 only.
Explanation : Radiation is spontaneously emitted from nuclei of  because this isotope of hydrogen is highly radioactive as compared to other isotopes of hydrogen namely; nuclei of
 because this isotope of hydrogen is highly radioactive as compared to other isotopes of hydrogen namely; nuclei of  and nuclei of
 and nuclei of  .
. 
They have much stable nucleus as compared to nuclei of  .
.
The more it is unstable the more radiations will be emitted from its nucleus.
 
        
                    
             
        
        
        
Explanation:
water evaporates because when h2o (water) particles heat up, they gain energy causing them to start to vibrate. this moves the oarticles further and further away from eachother and making the substance less dense, and turning it into a gas. meaning it has evaporated