Discussion Forum

The mass of a nucleus  $^{A}_{Z}X$ is less than the sum of the mass of (A-Z) number of neutrons and  Z number of protons in the nucleus. The energy equivalent to the corresponding mass difference is known as the binding energy of the nucleus.A heavy nucleus of mass M can break into two light nuclei of masses m₁ and m₂ only if (m₁+m₂) <M. Also two light nuclei of masses m₃  and m₄ can undergo complete fusion and form a heavy nucleus of mass M ' only if (m₃+m₄)>M'. The masses of some neutral  atoms are given in the table below:

The correct statement is

Answer:

Explanation:

(a)  $_{3}Li^{7}\rightarrow_{2}He^{4}+_{1}H^{3}$

 $\triangle m= [M_{Li}-M_{He}-M_{H^{3}}]$

 =[6.01513-4.002603-3.016050]

  = -1.003523 u

 $\triangle$ m is negative so reaction is not possible

(b)   $_{84}Po^{210}\rightarrow_{83}Bi^{209}+_{1}P^{1}$

 $\triangle$  m is negative so  reaction is not possible

(c)  $_{1}H^{2}\rightarrow_{2}He^{4}+_{3}Li^{6}$

   $\triangle$ m is positive  so reaction is possible

(d)    $_{30}Zn^{70}+_{34}Se^{82}\rightarrow_{64}Gd^{152}$

$\triangle$ m is positive  so reaction is not possible