The number of beta particles emitted by a radioactive substance is twice the number of alpha particles emitted by it. The resulting daughter is an

Step-by-step solution

Let the radioactive substance be _ Z ^ A X Radioactive transition is given by _ Z ^ A X - _ Z -2 ^ A -4 X -2 _ A -4 X The atoms of element having same atomic number but different mass numbers are called isotopes. So, _Z^A X and _Z^ A-4 X are isotopes.