# How is the radioactive decay of krypton-85 different from the radioactive decay of Americium-241?

##### 1 Answer

#### Explanation:

The stability of a nucleus depends on the relative number of neutrons and protons — the neutron/proton ratio (

(from www.kentchemistry.com)

If

If

∴

The stable value is closer to 1.3, so

The atomic number increases by 1 unit, but the mass number stays the same.

There are now 37 protons and 48 neutrons.

The product is the stable, non-radioactive nuclide, rubidium-85.

Every nucleus with more than 82 protons is radioactive.