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1 markAtomic Mass

CAPE Physics Unit 2 · 2004 · Paper 1 · Question 9(a)(ii)

Nuclear binding energy concepts.

Explain what is meant by the binding energy of a nucleus.

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  1. 9(a)(i)Explain what is meant by mass defect.[1 mark]
  2. 9(a)(iii)Explain what is meant by an isotope.[2 marks]
  3. 9(b)(i)Complete the nuclear reaction equations for (a) 238_92 U -> 237_91 Pa + ... and (b) 235_92 U + 1_0 n -> 141_55 Cs + 93_37 Rb + ...[2 marks]
  4. 9(b)(ii)Using the masses 238_92 U = 395.164 x 10^-27 kg, 237_91 Pa = 393.505 x 10^-27 kg, and 1_1 H = 1.673 x 10^-27 kg, show that 238_92 U CANNOT spontaneously emit a…[4 marks]

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