Atomic physics questions | form six Physics

State any two conclusions that can be drawn from the binding energy curve.

If the mass of deuterium nucleus is 2.015 a.mu , that of one isotope of helium is 3.017a.m.u and that of neutron is 1.009a.m.u. Calculate the energy released by the fusion of 1kg of deuterium, Suppose 50% of this energy was used to produce 1MW of electricity , for how many days would be able to function.

Distinguish between white spectrum and line spectrum.

If the energy necessary to cause the ejection of an electron by photoelectric effect from the N-shell and K-shell of an atom is 10eV and 20eV respectively, calculate the maximum wavelength of radiation for each level.

What is the significance of the binding per nucleon?

The nucleus of iron , with a mass of 56.935 a.m.u emits a -ray radiation of 14.4x10³eV. Calculate its recoil energy.

Given that Rydberg`s constant is approximately 1.1x10⁷m^-1. Calculate the corresponding range of frequency for emitted radiation in the

1. Lyman series.
2. Balmer series.

A radioactive isotope of Thallium , emits -particles with average energy of 1.5MeV. If the half life of the isotope is 135 days and is brought to emit -radiation:

1. Describe a simple test which could confirm the emission of – particles and -radiation?
2. Find the decay constant of the isotope.

Briefly explain why the -particles emmited from a radioactive source differ from the electrons obtained by thermionic emission?.

The mass of a particular radioisotope in a sample is initially 6.4x10^-3kg. After 42 days the isotope was separated from the sample and found to have a mass of 1.0x10^-4kg. Calculate the half-life of the isotope.