(A) (D) A
(C) 120
15. The volume of a nucleus in an atom is proportional to the:
(A) mass number
(B) proton number
(C) neutron number
(D) electron number
16. Which one of the following molecules are isotone ?
(A) 10 and 10
(B) 14C and !c
(C) C and IN
(D) None of these
17 Nucleus is more stable when :
(A) odd Z-odd N
(C) odd 2-even N
(B) even Z-even N
(D) even Z-odd N
18. Which one of the following is magic number?
(A) 60
(B) 88
(C) 52
(D) 82
19. Rutherford explained the scattering of: