2. Which of these best describes one of the subatomic particles that could be found at location X in the model of an atom below?

It has mass but no charge.
O It has no mass and a positive charge.
It has a large mass and a negative charge.
It has no mass and an equal number of positive and negative charges.

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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