Renaldo wants the students in his class to demonstrate the arrangement of the particles in a solid. What should he tell the students to do? remain seated in their seats

slide their chairs slowly past one another

move quickly about the room

form two lines against opposite walls

The students should stay in their seats

Explanation:

Since in a solid, the particles don't move at all, the students shouldn't move

the answer to this question is 3.

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.