What is sound energy? A. A wave transmitted by the vibration of particles bumping into each other.
B. Energy stored in the chemical bonds between atoms.
C. A wave of photons carry the energy.
D. Transfer of energy from waves to particles.

A

Explanation:

Because of the vibration

considering the question as per the attachment

here we can see that the radon nuclide has 222 as the atomic mass number and 86 as the atomic number.

when it undergoes nuclear fission it gives polonium which has atomic mass number as 218 and atomic number will be 84 along with a helium nucleus which has 4 atomic mass number and 2 as its atomic number.

222 = 218 + 4 (atomic mass number)

86 = ? + 2; therefore ? = 86-2 = 84.

the atomic mass number of polonium will be 84.