2004 Ministry Of Education Malaysia. All Rights Reserved. 1

Worksheet

Lesson: Nuclear Reaction I

Question 1

Which of the following is NOT true for a spontaneous nuclear reaction?

A Radioactive decays of radio isotopes are spontaneous nuclear reactions. B Spontaneous nuclear reactions occur naturally. C Spontaneous nuclear reactions can occur at a higher rate at higher temperature. D Spontaneous nuclear reactions are not affected by changes in pressure.

Question 2

The isotpe Ag11147 decays to produce Cd11148 by emission accompanied by radiation. The principle of conservation of energy in this decay is represented by the equation

A 22CdCd

2AgAg 2

121

21

vmvmum +=

B hfvmvmum ++= 22CdCd2AgAg 21

21

21

C ( ) hfcmmm = 2CdAg D ( ) 2CdAg cmmm = hfvmvm ++ 22CdCd 2

121

Question 3

Which of the following nuclear reactions cannot take place?

A HeHeLiH 4242

73

11 ++

B HePoRn 4221884

22286 +

C eNpU 01239

9323892 +

D CoHeNip 552742

5828

11 ++

2004 Ministry Of Education Malaysia. All Rights Reserved. 2

Question 4

U23892 is the nuclide notation for an isotope of uranium. What is the

i. mass number ii. atomic number iii. number of neutrons

in the uranium nucleus

Question 5

Explain why the decay of X23892 to Y239

93 by emission will not occur.

Question 6

A nitrogen nucleus N147 is bombarded by an alpha particle. It transmutes into an oxygen nucleus O17

8

and emits another particle y. The reaction can be denoted by O)y,(N . Write a balanced equation for this reaction and identify the particle y.

Question 7

The rest mass of a proton is equivalent to 939 MeV. (i) Explain what does it mean. (ii) Determine the mass of proton in kilogram.

Question 8

Calculate the energy released in the nuclear reaction

HeHeLiH 4242

73

11 ++

The atomic mass of the nuclei are given below.

element

atomic mass / u

H11

1.007825

Li73

7.016003

He42

4.002603