Advertisements
Advertisements
Questions
Write two important limitations of Rutherford's nuclear model of the atom.
Write the limitations of Rutherford's model of the atom.
Advertisements
Solution
Important limitations of Rutherford's nuclear model of the atom are:
- It could not explain why atoms emit light of only discrete wavelengths. for example, could a simple atom like hydrogen, consisting of a single electron and a single proton, emit a complex spectrum of specific wavelengths.
- He did not say anything about the arrangement of an electron in an atom.
- According to Maxwell, accelerated charged particles emit electromagnetic radiation and hence an electron revolving around the nucleus should emit electromagnetic radiation. This radiation would carry energy from the motion of the electron which would come at the cost of shrinking of orbits. Ultimately the electrons would collapse in the nucleus. This was a major limitation regarding the stability of an atom.
Notes
Students should refer to the answer according to their questions.
APPEARS IN
RELATED QUESTIONS
Using Rutherford's model of the atom, derive the expression for the total energy of the electron in hydrogen atom. What is the significance of total negative energy possessed by the electron?
An atom has a nearly continuous mass distribution in a ______ but has a highly non-uniform mass distribution in ______.
An electron in an atom revolves round the nucleus in an orbit of radius r with frequency v. Write the expression for the magnetic moment of the electron.
The basic force acting on the alpha particles using Coulomb's law is ______.
An automobile moves on a road with a speed of 54 km h−1. The radius of its wheels is 0.45 m and the moment of inertia of the wheel about its axis of rotation is 3 kg m2. If the vehicle is brought to rest in l 5s, the magnitude of average torque transmitted by its brakes to the wheel is:
In 88 Ra226 nucleus, there are
O2 molecule consists of two oxygen atoms. In the molecule, nuclear force between the nuclei of the two atoms ______.
A narrow beam of protons, each having 4.1 MeV energy is approaching a sheet of lead (Z = 82). Calculate:
- the speed of a proton in the beam, and
- the distance of its closest approach
The electron in a hydrogen atom is typically found at a distance of about 5.3 × 10−11 m from the nucleus which has a diameter of about 1.0 × 10−15 m. Assuming the hydrogen atom to be a sphere of radius 5.3 × 10−11 m, what fraction of its volume is occupied by the nucleus?
An alpha nucleus of energy `1/2`mv2 bombards a heavy nuclear target of charge Ze. Then the distance of closest approach for the alpha nucleus will be proportional to ______.
- v2
- `1/"m"`
- `1/"v"^2`
- `1/"Ze"`
