The radioactive nuclide `._(90)^(234) Th` shows two successive `beta-` decay followed by one `alpha-` decay. The atomic number and mass number respectively of the resulting atom is:

The radioactive nuclide ""_(90)""^(234)Th shows two succesive beta -decay followed by one alpha -decay. The atomic nuimber and mass number respectively of the resulting atom is

The radioactive isotope ._(90)^(234)Th undergoes two successive beta- decay followed by one alpha- decay. The atomic number and mass number respectively of the resulting atom is:

The radioactive nucleide ""_(90)^(134)Th undergoes two successive beta- deacys followed by one alpha - decay. The atomic number and mass number respectively of the resulting radionucleide is :

Change of atomic number and mass number for alpha & beta decay.

In a radioactive decay , an element ""_(Z) X^(A) emits four alpha - particles , three beta - particles and eight gamma photons . The atomic number and mass number of the resulting final nucleus are

During the alpha decay process atomic number is .......... by 2 and mass number is decreases by …….