Which of the following data would be most useful for describing the climate of a specific area? А
daily relative humidity levels for 18 weeks
B
total annual precipitation amounts for 2 years
с
average high and low monthly temperatures for 20 years
average weekly wind speeds for 1 month

what is the question here. i think you messed up.

може ли да зареждате повече информация, моля

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.