The following equation is an example of decay?

232/90 /2 he +228/88 ra?

Alpha decay

Explanation:

Alpha decay is one of the three major types of decays, others being, beta decay and gamma decay.When a radioactive isotope undergoes alpha decay it emits alpha particles. An alpha particle is equivalent to the nucleus of Helium atom.Therefore, an atom undergoing decay, its atomic mass is decreased by 4 and its atomic number is decreased by 2. Thus, since 232/90 Th, has undergone alpha decay its mass number is reduced by 4 to 228 and its atomic number by 2 to 88, and becomes 228/88 Ra.

Gas will most likely  fill the container