Only need help with number 1 plzzz help

According to the data results and the period table, these elements/substances are similar because they are in the same group; not only that but they both discharge from metals.

Explanation: I got you

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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b is the correct answer

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