Statement (iii) is correct because electrons occupy discrete stationary orbits without radiating energy. Statements (i), (ii) and (iv) are incorrect because electrons possess fixed quantized energies and cannot spiral inward or exist between allowed levels.
Which of the following statements are correct or incorrect according to the Bohr’s atomic model? Give a reason for each statement. (i) Electrons lose energy while moving in fixed orbits and slowly fall into the nucleus. (ii) Electrons can exist anywhere around the nucleus with no fixed energy. (iii) Electrons revolve around the nucleus in orbits of fixed energy without losing energy. (iv) Electrons can be found between energy levels as they move around the nucleus.
Share
Statement (iii) is correct because Bohr postulated that electrons revolve in designated orbits called stationary states where they do not radiate energy, maintaining atomic stability. Statement (i) is incorrect because non-radiating orbits prevent electrons from falling into the nucleus. Statements (ii) and (iv) are incorrect because electrons have strictly quantized energies and can only occupy specific allowed shells, never arbitrary spaces between them.
For more NCERT Solutions of Class 9 Science Exploration Chapter 8 Journey Inside the Atom Question Answer (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/science/exploration-chapter-8/