AIIMS 2010
- Exam
- AIIMS
- Year
- 2010
- Subject
- Chemistry
- Chapter
- Structure of Atom
AIIMS 2010 · Chemistry · Structure of Atom
Assertion : The nuclear isomers are the atoms with the same atomic...
Assertion : The nuclear isomers are the atoms with the same atomic number and same mass number, but with different radioactive properties.
Reason : The nucleus in the excited state will evidently have a different half-life as compared to that in the ground state.
Options
- AIf both assertion and reason are true and reason is the correct explanation of assertion
- BIf both assertion and reason are true but reason is not the correct explanation of assertion
- CIf assertion is true but reason is false
- DIf both assertion and reason are false.
Correct answer
A. If both assertion and reason are true and reason is the correct explanation of assertion
Step-by-step solution
The nuclear isomerism in the nuclei of same mass number and same atomic number arises due to different radioactive properties. The reason for nuclear isomerism is the different energy states of two isomeric nuclei. One may be in the ground state and other in an excited state. The nucleus in the excited state will have different half-life.