Home
Class 12
PHYSICS
Radioactive nuclei emit beta^-1 particle...

Radioactive nuclei emit `beta^-1` particles.
Electrons exist inside the nucleus.

A

If both Assertion and Reason are true and Reason is the correct explanation of Assertion.

B

If both Assertion and Reason are true but Reason are true but Reason is not correct explanation of Assertion.

C

If Assertion is true but Reason is false.

D

If Assertion is false but Reason is true.

Text Solution

Verified by Experts

The correct Answer is:
C
( C) the `beta^(-)` particle ( e) emitted from the nucleus in same radioactive trancformation . So electrons do not exisrt in the abverage life transformation
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • NUCLEI

    DC PANDEY ENGLISH|Exercise MATCH THE COLUMNS|4 Videos

  • NUCLEI

    DC PANDEY ENGLISH|Exercise C MADICAL ENTRANCES GALLERY|46 Videos

  • NUCLEI

    DC PANDEY ENGLISH|Exercise CHAPTER EXERCISES|78 Videos

  • MODERN PHYSICS - 2

    DC PANDEY ENGLISH|Exercise Level 2 Subjective|10 Videos

  • RAY OPTICS

    DC PANDEY ENGLISH|Exercise Medical entrance gallary|76 Videos

Similar Questions

Explore conceptually related problems

Assertion :Radioactive nuclei emit beta^-1 particles. Reason :Electrons exist inside the nucleus.

A: In beta -decay an electron is emitted by the nucleus R: Electrons are not present inside the nucleus.

Assertion (A) : Nucleus of the atom does not contain electrons, yet it emits beta- particles in the form of electrons. Reason (R): In the nucleus , protons and neutrons exchange mesons frequently.

Name the fundamental particle which exists in the nucleus

Some radioactive nucleus may emit.

A certain radioactive nucleus emits a particle that leaves its mass number unchanged, but increases its atomic number by one. Identify the particle and write its symbol.

In the disintegration of a radioactive element, alpha - and beta -particles are evolved from the nucleus. ._(0)n^(1) rarr ._(1)H^(1) + ._(-1)e^(0) + Antineutrino + Energy 4 ._(1)H^(1) rarr ._(2)He^(4) + 2 ._(+1)e^(0) + Energy Then, emission of these particles changes the nuclear configuration and results into a daughter nuclide. Emission of an alpha -particles results into a daughter element having atomic number lowered by 2 and mass number by 4, on the other hand, emission of a beta -particle yields an element having atomic number raised by 1. How many alpha - and beta -particle should be emitted from a radioactive nuclide so that an isobar is formed?

Assertion : In a radioactive disintegration, an electron is emitted by the nucleus. Reason : Electrons are always present inside the nucleus.

A radioactive substance emit 100 beta particfles in the first 2 s and 50 beta particles in the next 2s. The mean life of the sample is

._6^12 C absorbs an energenic neutron and emits beta particles. The resulting nucleus is.

Home
Profile