Question 175 of 239
The ratio of mass densities of nuclei of and is close to:
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Answer: (A)
Nucleus density is independent of the mass number. So, the ratio of density will be close to .
Atoms & Nuclei
JEE Main level, single correct, medium
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More Physics practice
- Atoms & NucleiThe energy of an electron in the ground state of hydrogen atom is . In the first excited state (), its energy is:
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Assertion (A) : Emission of electrons in photoelectric effect can be suppressed by applying a sufficiently negative electron potential to the photoemissive substance.
Reason (R) : A negative electric potential, which stops the emission of electrons from the surface of a photoemissive substance, varies linearly with frequency of incident radiation.
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Statement II: An atom is a spherical cloud of positive charges with electrons embedded in it, is a special case of Rutherford's model.
In the light of the above statements, choose the most appropriate from the options given below. - Atoms & NucleiIn Rutherford's alpha-particle scattering experiment, only a few alpha particles rebound back because
A. The size of gold nucleus is very small as compared to the size of gold atom.
B. Alpha particle and gold nucleus have equal charge.
C. The impact parameter is minimum for a few alpha particles.
D. A few alpha particles have very high kinetic energy.
E. Only a few alpha particles undergo head-on collision with the nuclei.
Choose the correct answer from the options given below:
JEE Main Physics practice question on Atoms & Nuclei (Nuclear structure), with the answer and a step-by-step solution. Scan a question from your own book or paper to get a whiteboard video.