If rust is scraped off a nail, and the nail is shiny on the inside, the inside was
a. chemically changed also.
b. not chemically changed.
c. physically and chemically changed.
d. neither physically nor chemically changed.

The answer is B

Explanation:

This is beacuse the nail that represent a physical change

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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