Join 60,000+ competitive exam aspirants
or with email
Your Cart
SubtotalтВ╣0
TotalтВ╣0
Examoogle тАв User тАв info@examoogle.com тАв EE-2024-8821
Chapter 1 of 12 тАв Page 1 of 248ЁЯФТ Protected PDF тАв Watermarked
Join 60,000+ competitive exam aspirants
Which of the following statements is/are correct regarding RutherfordтАЩs atomic model? Statement 1: The atom contains a dense, positively charged nucleus. Statement 2: Electrons orbit the nucleus in defined paths. Statement 3: The majority of an atom's volume is empty space.
Statement 1 only
Statements 1 and 2 only
Statements 1 and 3 only
All statements are correct
All statements are correct
Rutherford's alpha-particle scattering experiment demonstrated that the mass and positive charge of an atom are concentrated in a tiny central nucleus, while the surrounding region is mostly empty space where electrons move in circular paths.
Rutherford's alpha-particle scattering experiment demonstrated that the mass and positive charge of an atom are concentrated in a tiny central nucleus, while the surrounding region is mostly empty space where electrons move in circular paths.
Imagine a stadium as an atom; the nucleus is a cricket ball in the center of the pitch, while the electrons are like tiny flies buzzing around the highest seats, with the rest of the stadium being empty air.
F=r2kq1тАЛq2тАЛтАЛ тАФ Coulomb's law describing the electrostatic force between the nucleus and electrons
EpтАЛ=4╧А╧╡0тАЛ1тАЛтЛЕrQ1тАЛQ2тАЛтАЛ тАФ The potential energy of the charged system
When high-energy alpha particles were fired at a thin gold foil, most passed through undeflected, proving the atom is largely empty. A small fraction was deflected at large angles or bounced back, indicating they encountered a dense, positively charged concentration of mass (the nucleus) at the center.
Most of the atom is empty space.
A small, dense, positively charged nucleus occupies the center.
Electrons revolve around the nucleus in discrete orbits.
The model explained the scattering results of the Geiger-Marsden experiment.
Correctly identified the existence of a central nucleus.
Explained the majority of the atom's volume as empty space.
Could not explain the stability of the atom, as revolving electrons should lose energy via radiation and spiral into the nucleus.
Failed to explain the distribution of electrons and the line spectra of atoms.
Foundation for the Bohr model of the atom.
Basis for modern nuclear physics and alpha particle scattering theories.
The radius of the nucleus is approximately 10тИТ15┬аm, while the radius of an atom is about 10тИТ10┬аm.
Statement 2, although later refined by Bohr to quantized orbits, is considered correct in the context of the basic postulates of the Rutherford model.
D is correct тАФ All three statements accurately reflect the core postulates and findings of Rutherford's nuclear model of the atom.
Always remember that while Rutherford discovered the nucleus, he could not explain why atoms don't collapse; this limitation is exactly what Bohr's model solved by introducing quantized energy levels.