Ok so i met someone only and we talked about each other i asked for her insta and she gave it too me because she said we were best friends even tho we talked to her for and hour. I like and im afraid to ask her out. What should i do? Btw she is older than me

start by asking her that u want to something like something like this

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.