The Feynman diagram shows a particle interaction involving a W– boson.
Which particles are interacting?
U and Y
W– boson and Y
X and Y
U and X
A nucleus of the isotope plutonium-238 (238P) decays into a nucleus of uranium by emitting an alpha particle. What is the nucleon number of the uranium nucleus?
The particle x is a/an
The product of the binding energy per nucleon and the nucleon number
The minimum work required to completely separate the nucleons from each other
The energy that keeps the nucleus together
The energy released during the emission of an alpha particle
For which quantity can the unit MeVc–2 be used?
To explain the existence of isotopes
To describe nuclear emission and absorption spectra
To account for patterns in properties of elementary particles
To account for the missing energy and momentum in beta decay
The reaction p+ + n0 → p+ + π0 does not occur because it violates the conservation law of
They provide evidence for discrete energy levels in atoms.
Emission and absorption lines of equal frequency correspond to transitions between the same two energy levels.
Absorption lines arise when electrons gain energy.
Emission lines always correspond to the visible part of the electromagnetic spectrum.
Which of the following is the time taken for the activity of the isotope to change by `7/8`A?
The Geiger–Marsden experiment
The joining together of two small atoms to create a larger atom.
The splitting up of a large atom to create two smaller atoms.
The joining together of two small nuclei to create a larger nucleus.
The splitting up of a large nucleus to create two smaller nuclei.
The particle X is a
What is the nucleon number A of the isotope of carbon?
protons and neutrons.
What energy transition will occur when a photon is absorbed by the vapour?
–3.9eV to –1.6eV
–1.6eV to 0eV
–1.6eV to –3.9eV
0eV to –1.6eV
range in air.
In a neutral atom there are ne electrons, np protons and nn neutrons. What is the mass number of the nuclide?
np + ne + nn
np + nn
nn + np – ne
nn – ne
Which of the following gives the correct number of protons and neutrons in a nucleus of carbon-14
What are X and Y?
X + n → Y + Z + 2n
A student suggests the following nuclear reaction between deuterium
where n and m are integers. What are X and Y?
What is a possible pulse shape when the pulses overlap?