In which of the following decays the atomic number decreases?
(i) `alpha`-decay (ii) `beta^(+)`-decay
(iii) `beta^(-)`-decay (iv) electron capture

In a beta -decay

In which of the following , no change in mass number of the daughter nuclie takes place ? (i) alpha decay (ii) beta decay (iii) gamma decay (iv) neutron decay

In how many way among the following , a nucleus with high n/p ratio is expected to decay alpha - decay , beta - decay , positron decay , electron capture .

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

When nucleus of an electrically neutral atom undergoes a radioactive decay process, it will remain neutral after the decay if the process is (a) An alpha - decay (b) A beta^(o+) -decay (c ) A gamma -decay (d) A K - capture process