The scientist who discovered the two elements radium and polonium would be Marie Curie in 1898.
Hope this helps!
        
             
        
        
        
Answer:
Jackson 2: Smart 3: Ahmed
Explanation:
square + circle = egg
oops, wrong guy
 
        
             
        
        
        
On sources it says it would  just be the super giant star 
        
             
        
        
        
Answer:
Option C
100 J
Explanation:
Kinetic energy, KE is given by
 where m is the mass and v is the velocity
 where m is the mass and v is the velocity
Substituting 50 Kg for mass, m and 2 m/s for velocity v then we obtain

Therefore, the child's kinetic energy is equivalent to 100 J