What is science?
experimentation that discovers laws about the world around you.
a body of knowledge and a process of gaining that knowledge.
a large body of knowledge discovered using technology.
facts and theories about the world around us.

it is to be noted that an alpha particle is an helium nucleus. so it contains 2 protons 2 neutrons and has a mass number of 4. when alpha decay particles are ejected from the nucleus it gets transformed into an atom which has atomic number less than 2 and a mass number less than 4.

an equation that could represent alpha decay is radium 226 decay of alpha particle forms radon 222.

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not clear