Students set up three trials of an experiment to test the effect of the amount of water on bean plant growth. In each trial, five plants each receive one of three amounts of water. After one week, students measure the change in each plant's height. The table summarizes their data. Which data value is most likely to be an error in the data shown?

the answer is a for sure mark brainliest i had got this right on usatestprep

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.