Binding energy per nucleon versus mass number curve is as shown.AZS, A

1.	Binding energy per nucleon versus mass number curve is as shown.AZS, A1Z1W, A2Z2X and A3Z3Y are four nuclei indicated on the curve.Based on the graph:(a) Arrange X, W and S in the increasing order of stability.(b) Write the relation between the relevant A and Z values for the following nuclear reaction.S → X + W(c) Explain why binding energy for heavy nuclei is low.
Answer» (a) S,W,X (b) Z = Z1 + Z2 A = A1 + A2 (c) Reason for low binding energy: In heavier nuclei, the Colombian repulsive effects can increase considerably and can match/ offset the attractive effects of the nuclear forces. This can result in such nuclei being unstable.

Binding energy per nucleon versus mass number curve is as shown.AZS, A1Z1W, A2Z2X and A3Z3Y are four nuclei indicated on the curve.Based on the graph:(a) Arrange X, W and S in the increasing order of stability.(b) Write the relation between the relevant A and Z values for the following nuclear reaction.S → X + W(c) Explain why binding energy for heavy nuclei is low.

Answer»

(a) S,W,X

(b) Z = Z1 + Z2

A = A1 + A2

In heavier nuclei, the Colombian repulsive effects can increase considerably and can match/ offset the attractive effects of the nuclear forces. This can result in such nuclei being unstable.

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