46. Nucleons are

1. 1. protons and neutrons

   
   
   

   2. neutrons and electrons

   
   
   

   3. protons and electrons

   
   
   

   4. protons, neutrons and electrons

   
   
   

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   NA

   Correct Option: A

   NA

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47. Isotopes of the same elements have

1. 1. same number of neutrons

   
   
   

   2. same number of protons

   
   
   

   3. same atomic mass

   
   
   

   4. different chemical properties

   
   
   

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   NA

   Correct Option: B

   NA

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48. Rutherford's scattering experiment related to the size of the

1. 1. nucleus

   
   
   

   2. atom

   
   
   

   3. electron

   
   
   

   4. neutron

   
   
   

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   NA

   Correct Option: A

   NA

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49. Mass of electron is

1. 1. 1.66 x 10^-24 g

   
   
   

   2. 6.023 x 10^-23 g

   
   
   

   3. 9.1 x 10^-28 g

   
   
   

   4. 9.1 x 10^-25 g

   
   
   

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   NA

   Correct Option: C

   NA

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50. Radioactive isotope of hydrogen is

1. 1. Protium

   
   
   

   2. Deuterium

   
   
   

   3. Tritium

   
   
   

   4. All

   
   
   

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   NA

   Correct Option: C

   NA

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