Advertisements
Advertisements
प्रश्न
A nuclide 1 is said to be the mirror isobar of nuclide 2 if Z1 = N2 and Z2 = N1. (a) What nuclide is a mirror isobar of 1123 Na? (b) Which nuclide out of the two mirror isobars have greater binding energy and why?
Advertisements
उत्तर
Mirror nuclei are nuclei where the number of protons of element one (Z1) equals the number of neutrons of element two (N2), the number of protons of element two (Z2) equal the number of neutrons in element one (N1) and the mass number is the same.
Pairs of mirror nuclei have the same spin and parity. If we constrain to an odd number of nucleons (A), then w find mirror nuclei that differ from one another by exchanging a proton with a neutron. Interesting to observe is their binding energy which is mainly due to the strong interaction and also due to Coulomb interaction. Since the strong interaction is invariant to protons and neutrons one can expect these mirror nuclei to have very similar binding energies.
(a) According to the question, nuclide 1 is said to be the mirror isobar of nuclide 2, if Z1 = N2 and Z2 = N1.
Now In 11Na23, Z1 = 11, N1, = 23 – 11 = 12
∴ Mirror isobar of 11Na23 is 12Mg23, for which Z2 = 12 = N1 and N2 = 23 – 12 = 11 = Z1
(b) We know 1223Mg contains even number of protons (12) against 1123Na which has odd number of protons (11), therefore 1123Mg has greater binding energy than 11Na23.
APPEARS IN
संबंधित प्रश्न
Two stable isotopes of lithium `""_3^6"Li"` and `""_3^7"Li"` have respective abundances of 7.5% and 92.5%. These isotopes have masses 6.01512 u and 7.01600 u, respectively. Find the atomic mass of lithium.
Write one balanced equation to show Emission of `beta^-` (i.e. a negative beta particle)
Two nuclei have mass numbers in the ratio 1: 2. What is the ratio of their nuclear densities?
If neutrons exert only attractive force, why don't we have a nucleus containing neutrons alone?
The mass number of a nucleus is
Find the Q-value and the kinetic energy of the emitted α-particle in the α-decay of `""_86^220"Rn"`.
Given `"m"(""_88^226"Ra")` = 226.02540 u, `"m"(""_86^222 "Rn")` = 222.01750 u,
`"m"(""_86^220 "Rn")`= 220.01137 u, `"m"(""_84^216 "Po")`= 216.00189 u.
Nuclear species or nuclides are shown by the notation ________ where X is the chemical symbol of the species.
\[\ce{^197_79Au}\] contains ______.
A nucleus yYx emits one α and two β particles. The resulting nucleus is ______.
The mass number of a nucleus is equal to the number of:-
Are the nucleons fundamental particles, or do they consist of still smaller parts? One way to find out is to probe a nucleon just as Rutherford probed an atom. What should be the kinetic energy of an electron for it to be able to probe a nucleon? Assume the diameter of a nucleon to be approximately 10–15 m.
Before the neutrino hypothesis, the beta decay process was throught to be the transition, `n -> p + vece`. If this was true, show that if the neutron was at rest, the proton and electron would emerge with fixed energies and calculate them. Experimentally, the electron energy was found to have a large range.
Two nuclei have different mass numbers A1 and A2. Are these nuclei necessarily the isotopes of the same element? Explain.
Two nuclei may have the same radius, even though they contain different numbers of protons and neutrons. Explain.
What is ‘Pair production’?
A nucleus with mass number 240 breaks into two fragments each of mass number 120, the binding energy per nucleon of unfragmented nuclei is 7.6 MeV while that of fragments is 8.5 MeV. The total gain in the binding energy in the process is:
The volume occupied by an atom is greater than the volume of the nucleus by a factor of about:
1 amu is defined as:
