NEETPhysicsAtoms and NucleiMCQ+4 / −1
-particale consists of :
- A2 electrons, 2 protons and 2 neutrons
- B2 electrons and 4 protons only
- C2 protons only
- D2 protons and 2 neutrons only
View written solutionFree
Correct answer: D
Since, -particle is equivalent to He-atom nucleus, hence it has two protons and two neutrons only.
More from Atoms and Nuclei
- The total energy of an electron in an atom in an orbit is –3.4 eV. Its kinetic and potential energies are, respectively.2019 · MCQ
- The ratio of kinetic energy to the total energy of an electron in a Bohr orbit of the hydrogen atom, is2018 · MCQ
- The ratio of wavelengths of the last line of Balmer series and the last line of Lyman series is2017 · MCQ
- Given the value of Rydberg constant is 107 m1, the wave number of the last line of the Balmer series in hydrogen spectrum will be2016 · MCQ
- When an -particle of mass m moving with velocity v bombards on a heavy nucleus of charge Ze, its distance of closest approach from the nucleus depends on m as2016 · MCQ
- If an electron in a hydrogen atom jumps from the 3rd orbit to the 2nd orbit, it emits a photon of wavelength . When it jumps from the 4th orbit to the 3rd orbit, the corresponding wavelength of the photon will be2016 · MCQ
- A nucleus of uranium decays at rest into nuclei of thorium and helium. Then2015 · MCQ
- In the spectrum of hydrogen, the ratio of the longest wavelength in the Lyman series to the longest wavelength in the Balmer series is2015 · MCQ