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Chapter 28: Problem 5
Which of the following is not a method of detection and measurement of radioactivity? (a) Slater method (b) Wilson cloud chamber method (c) Geiger-Muller counter (d) Scintillation method
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When an atom emits an a-particle, for the new atom formed, (a) the atomic number is decreased by one unit and the atomic mass is increased by one unit (b) the atomic number is decreased by one unit and the atomic mass is decreased by two units (c) the atomic number is decreased by two units and atomic mass is increased by four units (d) the atomic number is decreased by two units and atomic mass is decreased by four units
\({ }_{14}^{30} \mathrm{Si},{ }_{15}^{31} \mathbf{p}\) and \({ }_{16}^{32} \mathrm{~S}^{a r e}\) (a) isotopes (b) isobars (c) isotones (d) none of these
The stable end product in the uranium series \(\left({ }_{92}^{238} \mathrm{U}\right)\) is (a) \({ }_{82}^{205} \mathrm{~Pb}\) (b) \({ }_{82}^{206} \mathrm{~Pb}\) (c) \({ }_{82}^{207} \mathrm{~Pb}\) (d) \({ }_{82}^{208} \mathrm{~Pb}\)
The reaction \({ }_{1}^{1} \mathrm{H}+{ }_{1}^{1} \mathrm{H}+2{ }_{0}^{1} \mathrm{n} \longrightarrow{ }_{2}^{4} \mathrm{He}^{+}\) Energy is an example if (a) capture reaction (b) spallation reaction (c) fusion reaction (d) fission reaction
Magic numbers as applied to stability of atom are (a) \(1,7,19,27\) (b) \(3,9,21,29\) (c) \(10,20,30,40\) (d) \(2,8,20,28\)
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