Identify from following, the products of K-electron capture by the nucleus:

A. neutron

B. neutrino

C. positron

Answer is

This question was previously asked in
CSIR-UGC (NET) Chemical Science: Held on (15 Dec 2019)
View all CSIR NET Papers >
  1. A only
  2. A and B
  3. C only
  4. B and C

Answer (Detailed Solution Below)

Option 2 : A and B
Free
Seating Arrangement
3.8 K Users
10 Questions 20 Marks 15 Mins

Detailed Solution

Download Solution PDF

Concept:

→ K-electron capture is a type of radioactive decay process in which an unstable atomic nucleus captures one of its own inner-shell electrons (usually a K-electron) and combines with a proton in the nucleus to form a neutron. This process results in a decrease in atomic number by one and no change in mass number.

Explanation:

→ The K-electron capture occurs when the binding energy of an electron in the K-shell is greater than the energy difference between the initial and final states of the nucleus.

→ When this condition is met, the electron can be captured by the nucleus and combines with a proton to form a neutron. The process is represented by the following equation:

p + e- → n + ν

where p represents a proton, e- represents a K-shell electron, n represents a neutron, and ν represents an electron neutrino that is emitted during the process.

→ K-electron capture is a type of radioactive decay process in which an unstable nucleus captures one of its own inner-shell electrons (usually a K-electron) and combines with a proton in the nucleus to form a neutron. This process results in a decrease in atomic number by one and no change in mass number.

→ During K-electron capture, the nucleus emits a neutrino (ν) in order to conserve lepton number. Lepton number is a fundamental quantity in particle physics that is conserved in all interactions. The electron neutrino (νe) is the type of neutrino that is typically emitted during K-electron capture.

Conclusion:

The correct answer is A and B.

Latest CSIR NET Updates

Last updated on Jul 8, 2025

-> The CSIR NET June 2025 Exam Schedule has been released on its official website.The exam will be held on 28th July 2025.

-> The CSIR UGC NET is conducted in five subjects -Chemical Sciences, Earth Sciences, Life Sciences, Mathematical Sciences, and Physical Sciences. 

-> Postgraduates in the relevant streams can apply for this exam.

-> Candidates must download and practice questions from the CSIR NET Previous year papers. Attempting the CSIR NET mock tests are also very helpful in preparation.

Get Free Access Now
Hot Links: teen patti circle teen patti - 3patti cards game teen patti joy 51 bonus