Question 1
The ratio of the radius of a classical electron (re = kee2/mec2 = 2.8 × 10−15 m) to the radius of a 4He nucleus (r = r0A1/3) is
◦
2.0
◦
0.68
◦
1.5
◦
0.92
◦
2.4
Question 2
The reaction energy associated with a nuclear reaction is
◦
the total change in rest energy as a result of the reaction.
◦
equivalent to the disintegration energy.
◦
the minimum energy necessary for such a reaction to occur.
◦
called the threshold energy.
◦
the binding energy of the nucleons.