If the mass of the iron nucleus is \(55.85~\text{u}\) and \(\mathrm{A} = 56\), the nuclear density of the iron is:
1. | \(2.27\times10^{17}~\text{kg m}^{-3}\) |
2. | \(1.36\times 10^{15}~\text{kg m}^{-3}\) |
3. | \(3.09\times10^{17}~\text{kg m}^{-3}\) |
4. | \(4.11\times10^{15}~\text{kg m}^{-3}\) |
The energy equivalent of \(1\) g of substance is:
1. | \(8.3\times10^{13}~\text{J}\) | 2. | \(9\times10^{13}~\text{J}\) |
3. | \(7.7\times10^{13}~\text{J}\) | 4. | \(11\times10^{13}~\text{J}\) |
We are given the following atomic masses:
= 238.05079 u, = 4.00260 u
= 234.04363 u, = 1.00783 u
= 237.05121 u
Here the symbol Pa is for the element protactinium (Z = 91).
The energy released during the alpha decay of is:
1. 6.14 MeV
2. 7.68 MeV
3. 4.25 MeV
4. 5.01 MeV
We are given the following atomic masses:
= 238.05079 u, = 4.00260 u
= 234.04363 u, = 1.00783 u
= 237.05121 u
Here the symbol Pa is for the element protactinium (Z = 91).
Then:
1. can not spontaneously emit a proton.
2. can spontaneously emit a proton.
3. The Q-value of the process is negative.
4. Both (1) and (3)