In a radioactive decay, neither the atomic number nor the mass number changes. Which of the following particles is emitted in the decay?

What form of radioactive decay reduces the atomic number of protons by 2 ?

In which of the following decays the atomic number decreases?

In which of the following decays the atomic number decreases?

At a result of radioactive decay a ._(92)^(238)U nucleus is changed to a ._(91)^(234)P nucleus. Which particles are emitted in the decay?

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

Assuming that only particles emitted from atoms during natural radioactive decay are alpha and beta particles, which of the following atoms could not possibly result from the natural decay of ._(92)U^(235) atoms ?

When a nucleus undergoes radioactive decay, its new mass number is