G Determine the concentration of a solution prepared by diluting 25 ml of a stock 0.188 M Mg(NO3)2

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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indium, and thallium have three electrons i think

that's what i got you can count the number of atoms