Scientist know that all living things, from the smallest bacterium to the largest blue whale, are made of cells. why is this a scientific consensus

This is a scientific consensus because it is the collective judgement of scientists.

Consensus means that there is general agreement. It doesn’t mean that all scientists agree.

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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