Explain, with the help of a nuclear reaction in each of the following cases, how the neutron to proton ratio changes during (i) alpha- decay (ii) beta-decay?
241Am95 â ZXA + 4He2
A = number of protons = 95 - 2 = 93
X = the element with atomic number = 93
According to the periodic table, X = neptunium or Np.
138I53 â ZXA + 0e-1
A = number of protons = 53 + 1 = 54
X = the element with atomic number = 54
According to the periodic table , X = xenon or Xe
The mass number, A, remains unchanged because the loss of one neutron is offset by the gain of a proton.