Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
Concepts Of Physics MCQ Edition [Volume 2]PhysicsThe Nucleus

Carbon ( Z = 6 ) possessing mass number 11 decays into boron ( Z = 5 ). Identify the type of decay taking place.

Options

  1. A⁻ -decay
  2. B-decay
  3. C⁺ -decay
  4. D-decay

Correct answer

C. ⁺ -decay

Step-by-step solution

The nuclear reaction for the decay of Carbon-11 into Boron-11 can be written as: ¹¹₆ C ¹¹₅ B + ⁰_ +1 e + In this process, the mass number remains unchanged ( A = 11 ) while the atomic number decreases by 1 (from Z = 6 to Z = 5 ). This indicates that a proton is converted into a neutron, emitting a positron ( e⁺ or ⁺ ) and a neutrino ( ). Therefore, the process is ⁺ -decay.

Practice The Nucleus on Quantrex Academy →

More from The Nucleus

A neutron star possesses a density equivalent to that of nuclear matter. Assuming the star is spherical, determine the radius of a neutron star with a mass of 4.0 10³⁰ kg (twice thDetermine the amount of energy released during the reaction given below: ⁷ Li + p + . The atomic mass of ⁷ Li is 7.0160 u and that of ⁴ He is 4.0026 u .Determine the binding energy per nucleon of ¹⁹⁷₇₉ Au , given that its atomic mass is 196.96 u .Compute the energy released if an -particle is emitted by ²³⁸ U . The atomic masses of ²³⁸ U , ²³⁴ Th , and ⁴ He are 238.0508 u , 234.04363 u , and 4.00260 u respectively.Suppose that the mass of a nucleus is roughly given by M = A m_p , where A represents the mass number. Estimate the density of matter inside a nucleus in kg m ⁻³ , and determine thDetermine the mass of an -particle, given that its binding energy is 28.2 MeV .Compute the energy that needs to be supplied to ²³⁸ U in order for two protons and two neutrons to be emitted one by one. The atomic masses of ²³⁸ U , ²³⁴ Th , and ⁴ He are 238.050Calculate the energy released in the nuclear reaction ²²³ Ra ²⁰⁹ Pb + ¹⁴ C . The necessary atomic masses are provided below. ²²³ Ra ²⁰⁹ Pb ¹⁴ C 223.018 u 208.981 u 14.003 u Full The Nucleus list All Concepts Of Physics MCQ Edition [Volume 2] PYQs