Below is a data table on properties of different substances. Iron Oxidizes Solid at room temperature Melting point 2800 degrees F Attracted to a magnet
Mercury Oxidizes Liquid at room temperature Melting point -37 degrees F Weakly attracted to a magnet
Which statement best describes a chemical property of iron?

oxidizes
solid at room temperature
attracted to a magnet
melting point 2800 degrees F

answer; /// i do believe that the correct answer is (c)nuclear bond

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.