Hurry

which describes how fast-moving particles assist in transferring thermal energy to a cup after hot tea is poured into it?

a. they replace slow-moving particles.
b. they collide with slow-moving particles.
c. they collide with other fast-moving particles.
d. they are replaced by slow-moving particles.

The CORRECT answer is B. They collide with slow-moving particles.

i think it is true since you can test the answer and can use observations to complete it.

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.