NDA 2025
- Exam
- NDA
- Year
- 2025
- Subject
- General Ability
- Chapter
- General Science
NDA 2025 · General Ability · General Science
Which one of the following findings is NOT observed in Rutherford's...
Which one of the following findings is NOT observed in Rutherford's Nuclear Model of Atom?
Options
- AThere is a neutral centre in an atom called nucleus
- BNearly all the mass of an atom resides in the nucleus
- CThe electrons revolve around the nucleus in a circular path
- DThe size of a nucleus is very small as compared to the size of atom
Correct answer
A. There is a neutral centre in an atom called nucleus
Step-by-step solution
According to Rutherford's Nuclear Model of Atom, the positive charge and most of the mass of the atom are densely concentrated in an extremely small region called the nucleus. The nucleus is positively charged, not neutral.
The other statements are correct postulates of Rutherford's model:
Nearly all the mass of an atom resides in the nucleus.
The electrons revolve around the nucleus in circular paths called orbits.
The size of the nucleus is very small as compared to the size of the atom.
Therefore, the statement that there is a neutral centre in an atom called nucleus is not observed in Rutherford's model.
Answer: There is a neutral centre in an atom called nucleus
The other statements are correct postulates of Rutherford's model:
Nearly all the mass of an atom resides in the nucleus.
The electrons revolve around the nucleus in circular paths called orbits.
The size of the nucleus is very small as compared to the size of the atom.
Therefore, the statement that there is a neutral centre in an atom called nucleus is not observed in Rutherford's model.
Answer: There is a neutral centre in an atom called nucleus