Q: When two deuterium nuclei fuse together to form a tritium nucleus, we get a

Here the nuclear reaction : \$2 _1^2H(deutron) \rightarrow _1^3H (tritium)\$ For balancing the reaction : \$2 _1^2H \rightarrow _1^3H+ _1^1H(proton)\$ Thus, we will get a proton in this reaction.

Q: The difference between the mass of a nucleus and the combined mass of its nucleons is :

We know that mass defect \$=\$ combined mass of nucleons \$-\$ mass of the nucleus.Since mass defect is always positive quantity so the difference of nucleus and the combined mass of its nucleons will be negative. The combined mass is greater than the mass of nucleus.

Question 1

When two deuterium nuclei fuse together to form a tritium nucleus, we get a

Accepted Answer

Here the nuclear reaction :  $2 _1^2H(deutron)  \rightarrow _1^3H (tritium)$ For balancing the reaction :  $2 _1^2H  \rightarrow _1^3H+ _1^1H(proton)$ Thus, we will get a proton in this reaction.

Question 2

If $M$ is atomic weight , $A$ is mass number then $\dfrac{M-A}{A}$ represents :

Accepted Answer

Packing fraction is the mass defect per nucleon i.e. elementary particle in the nucleus. The difference between atomic weight and mass number i.e. mass of elementary particle in the nucleus is known as mass defect. Hence,$p = \dfrac{\Delta m}{A}$$p =  \dfrac{M - A}{A}$

Question 3

Which of the following is wrong statement about binding energy ?

Accepted Answer

The first three options are correct from the definition of Binding energy.B.E. has nothing to do with K.E. of the nucleons in nucleus.

Question 4

The difference between the mass of a nucleus and the combined mass of its nucleons is :

Accepted Answer

We know that mass defect $=$ combined mass of nucleons $-$ mass of the nucleus.Since mass defect is always positive quantity so the difference of nucleus and the combined mass of its nucleons will be negative. The combined mass is greater than the mass of nucleus.

Question 5

What parameter is used to measure the stability of a nucleus?

Accepted Answer

Stability of nucleus is based on average binding energy i.e. binding energy per nucleon. This much energy will be needed for nucleon to break free.

Question 6

The binding energies of a deutron and an $\alpha $ -particle are 1.125, 7.2 MeV/nucleon respectively. Which is more stable of the two?

Accepted Answer

The binding energy is a energy that holds the nucleus together. Thus, more binding energy will give more stable nuclei. Here alpha particle has more binding energy so it will be more stable than deutron.

Question 7

What is the average binding energy per nucleon over a wide range ?

Accepted Answer

The average binding energy per nucleon is just the total binding energy divided by the number of nucleons.If we consider $Na$ atom, its binding energy is 194 MeV. Its binding energy per nucleon is given by $\dfrac {194 MeV} {24} = 8.08 MeV$

Question 8

When the number of nucleons in a nucleus increases, the binding energy per nucleon :

Accepted Answer

The binding energy is the energy released when a nucleus is assembled from its constituent nucleons. It is thus a measure of the amount of energy held within the bonds of the atom and corresponds to the energy required to be put in again to pull the nucleons apart. Hence, the energy equivalent of the mass-defect is called the binding-energy of the nucleus.The larger the nucleus, the greater is the internal repulsive forces due to the greater number of protons and less energy must be applied to remove a nucleon from the nucleus, hence the binding energy is lower. The greater the binding energy, the more stable the atom is. This variation in the binding energy per nucleon ($\cfrac{BE}{A}$) is easily seen when the average $\cfrac{BE}{A}$ is plotted versus atomic mass number (A), as shown in the figure, as the atomic mass number increases i.e. the number of particles in a nucleus increases, the total binding energy also increases first and then decreases for A > 56.

Question 9

Bombardment of Beryllium by alpha particles resulted in the discovery of :

Accepted Answer

Bombardment of Beryllium by alpha particles reaction is given as below:$_4^9Be + _2^4He \rightarrow [_6^{13}C] \rightarrow _6^{12}C + _0^1n$So, correct choice is option C.

Question 10

The short range attractive nuclear forces that are responsible for the binding of nucleons in a nucleus are supposed to be caused by the role played by the particles called

Accepted Answer

The nuclear force between a neutron and proton is the result of the exchange of charged mesons $({\pi}^+{\pi}^-)$ between them.So, correct answer is $\pi$-Meson.

Nuclei

Physics
4922 Views

When two deuterium nuclei fuse together to form a tritium nucleus, we get a

If $M$ is atomic weight , $A$ is mass number then $\frac{M - A}{A}$ represents :

Which of the following is wrong statement about binding energy ?

The difference between the mass of a nucleus and the combined mass of its nucleons is :

What parameter is used to measure the stability of a nucleus?

The binding energies of a deutron and an $α$ -particle are 1.125, 7.2 MeV/nucleon respectively. Which is more stable of the two?

What is the average binding energy per nucleon over a wide range ?

When the number of nucleons in a nucleus increases, the binding energy per nucleon :

Bombardment of Beryllium by alpha particles resulted in the discovery of :

The short range attractive nuclear forces that are responsible for the binding of nucleons in a nucleus are supposed to be caused by the role played by the particles called

Nuclei

Physics 4922 Views

When two deuterium nuclei fuse together to form a tritium nucleus, we get a

If M is atomic weight , A is mass number then AM−A​ represents :

Which of the following is wrong statement about binding energy ?

The difference between the mass of a nucleus and the combined mass of its nucleons is :

What parameter is used to measure the stability of a nucleus?

The binding energies of a deutron and an α -particle are 1.125, 7.2 MeV/nucleon respectively. Which is more stable of the two?

What is the average binding energy per nucleon over a wide range ?

When the number of nucleons in a nucleus increases, the binding energy per nucleon :

Bombardment of Beryllium by alpha particles resulted in the discovery of :

The short range attractive nuclear forces that are responsible for the binding of nucleons in a nucleus are supposed to be caused by the role played by the particles called

Physics
4922 Views

If $M$ is atomic weight , $A$ is mass number then $\frac{M - A}{A}$ represents :

The binding energies of a deutron and an $α$ -particle are 1.125, 7.2 MeV/nucleon respectively. Which is more stable of the two?