The mass of a proton is 1.0073 u and that of the neutron is 1.0087 u (u = atomic mass unit) The binding energy of H2e4 is (mass of helium nucleus = 4.0015 u)

1. 28.4 MeV

2. 0.061 u

3. 0.0305 J

4. 0.0305 erg

Subtopic:  Mass-Energy Equivalent |
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The energy equivalent of one atomic mass unit is:

1. 1.6×10-19 J 

2. 6.02×1023 J

3. 931 MeV 

4. 9.31 MeV

Subtopic:  Mass-Energy Equivalent |
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mP and mn are masses of proton and neutron respectively. An element of mass m has Z protons and N neutrons, then 

1. m>Zmp+Nmn

2. m=Zmp+Nmn

3. m<Zmp+Nmn

4. m may be greater than, less than or equal to Zmp+Nmn, depending on the nature of the element.

Subtopic:  Mass-Energy Equivalent |
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The nuclei C136 and N147 can be described as [1990]

1. isotones

2. isobars 

3. isotopes of carbon

4. isotopes of nitrogen

Subtopic:  Mass-Energy Equivalent |
 88%
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If a proton and anti-proton come close to each other and annihilate, how much energy will be released:

1. 1.5×10-10 J           

2. 3×10-10 J         

3. 4.5×10-10 J         

4. None of these

Subtopic:  Mass-Energy Equivalent |
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Light energy emitted by stars is due to

1. Breaking of nuclei 

2.Joining of nuclei       

3. Burning of nuclei

4. Reflection of solar light

Subtopic:  Mass-Energy Equivalent |
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The constituents of atomic nuclei are believed to be [1991]

1. neutrons and protons

2. protons only

3. electrons and protons

4. electrons, protons and neutrons

Subtopic:  Mass-Energy Equivalent |
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If in a nuclear fusion  process, the masses of the fusion nuclei be m1 and m2 and the mass of the resultant nucleus be m3, then [2004]

1. m3=m1+m2

2. m3=m1-m2

3. m3<m1+m2 

4. m3>m1+m2

Subtopic:  Mass-Energy Equivalent |
 81%
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The nuclei of which one of the following pairs of nuclei are isotones? [2005]

1. S34e74, G31a71 

2. M42o92, Z40r92

3. S38r84, S38r86 

4. C20a40, S3216

Subtopic:  Nuclear Binding Energy | Mass-Energy Equivalent |
 87%
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The volume occupied by an atom is greater than the volume of the nucleus by factor of about [2003]

1. 1010 

2. 1015 

3. 101 

4. 105

Subtopic:  Mass-Energy Equivalent |
 65%
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