The rest energy of an electron is

(a) 510 KeV            (b) 931 KeV
(c) 510 MeV            (d) 931 MeV

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In Ra22688 nucleus, there are 
(a) 138 protons and 88 neutrons
(b) 138 neutrons and 88 protons
(c) 226 protons and 88 electrons
(d) 226 neutrons and 138 electrons

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Outside a nucleus 
(a) Neutron is stable
(b) Proton and neutron both are stable
(c) Neutron is unstable
(d) Neither neutron nor proton is stable

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Order of magnitude of density of uranium nucleus is (mP=1.67×10-27 kg)
(a) 1020 kg/m3           (b) 1017 kg/m3
(c) 1014 kg/m3           (d) 1011 kg/m3

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Radius of He24 nucleus is 3 Fermi. The radius of Pb82206 nucleus will be 
(a) 5 Fermi                 (b) 6 Fermi
(c) 11.16 Fermi           (d) 8 Fermi

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Nucleus of an atom whose atomic mass is 24 consists of

(a) 11 electrons, 11 protons and 13 neutrons
(b) 11 electrons, 13 protons and 11 neutrons
(c) 11 protons and 13 neutrons
(d) 11 protons and 13 electrons

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The mass of a neutron is the same as that of 
(a) A proton                 (b) A meson
(c) An epsilon               (d) An electron

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The mass defect per nucleon is called

(a) Binding energy             (b) Packing fraction
(c) Ionisation energy          (d) Excitation energy

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Nuclear forces are

(a) Short ranged attractive and charge independent
(b) Short ranged attractive and charge dependent
(c) Long ranged repulsive and charge independent
(d) Long ranged repulsive and charge dependent

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Antiparticle of electron is
(a) n10               (b) H11
(c) Positron        (d) Neutrino

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