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Chapter 43: Q4Q (page 1329)

Do the initial fragments formed by fission have more protons than neutrons, more neutrons than protons, or about the same number of each?

Short Answer

Expert verified

The initial fragments formed by fission have more neutrons than protons.

Step by step solution

01

Nuclear Fission

Nuclear fission is the phenomenon in which the nucleus of a heavier atom disintegrates into smaller nuclei due to the bombardment of a neutron. The heavier nucleus disintegrates as the ratio of neutron and proton becomes high.

02

Identification of the given condition of neutron and protons in initial fragments

The number of neutrons in the initial fragments of nuclear fission is more than the number of protons because nuclear fission is initiated by the neutron, and the number of protons decreases in the decay process initially fast. The number of protons decreases fast due to the repulsive force among the protons in the same nuclei.

Therefore, the initial fragments formed by fission have more neutrons than protons.

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Most popular questions from this chapter

In an atomic bomb, energy release is due to the uncontrolled fission of plutonium Pu239(or U235). The bomb鈥檚 rating is the magnitude of the released energy, specified in terms of the mass of TNT required to produce the same energy release. One megaton of TNT releases 2.6脳1028MeVof energy. (a) Calculate the rating, in tons of TNT, of an atomic bomb containing 95 kg of Pu239, of which 2.5 kg actually undergoes fission. (See Problem 4.) (b) Why is the other 92.5 kg of Pu239needed if it does not fission?

At the center of the Sun, the density of the gas is1.5脳105kg/m3 and the composition is essentially 35% hydrogen by mass and 65% helium by mass. (a) What is the number density of protons there? (b) What is the ratio of that proton density to the density of particles in an ideal gas at standard temperature (0掳C) and pressure(1.01脳105Pa) ?

Many fear that nuclear power reactor technology will increase the likelihood of nuclear war because reactors can be used not only to produce electrical energy but also, as a by-product through neutron capture with inexpensiveU238 , to makeP239u , which is a 鈥渇uel鈥� for nuclear bombs. What simple series of reactions involving neutron capture and beta decay would yield this plutonium isotope?

How long ago was the ratioU235U238in natural uranium deposits equal to 0.15?

A nuclear reactor is operating at a certain power level, with its multiplication factor k adjusted to unity. If the control rods are used to reduce the power output of the reactor to 25% of its former value, is the multiplication factor now a little less than unity, substantially less than unity, or still equal to unity?
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