4. Another way to model water is with letters and lines is like this: H-O-H. What is one way that these two models are different?
A. They show different types and numbers of atoms.
B. The atoms are connected in a different order.
C. The forces holding the atoms together are represented differently.
D. One model clearly shows a repeating pattern.

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Explanation:

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.