Two identical nuclei of mass 18 u are made to unite to make a single nucleus of mass 36 u.What is the radius of the result of this fusion?
A) 4.0 fm
B) 6.3 fm
C) 4.5 fm
D) 7.2 fm

Question

Quizplus · Accepted Answer

The radius of a nucleus is proportional to the cube root of its mass number. So, the radius of the resulting nucleus is (36/18)^(1/3) = 2 times the radius of the original nuclei. The radius of a nucleus is approximately 1.2 fm, so the radius of the resulting nucleus is 2 * 1.2 fm = 2.4 fm.

Two Identical Nuclei of Mass 18 U Are Made to Unite