3. Given the following definitions: Valence electrons: electrons in the incomplete outermost energy level.
Kernel electrons: electrons in the completely filled lower energy levels.

a. Why are the valence electrons emphasized when discussing atomic bonding and
properties?

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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the answer would be a