Distilled water (H20) can be made from tap water by removing dissolved minerals and various other chemicals. How should each type of water be classified?

A. Tap water is a homogeneous mixture and distilled water is a pure substance,

B. Tap water is a heterogeneous mixture and distilled water is a pure substance,

C. Tap water is a pure substance while distilled water is a homogeneous mixture.

D. Tap water and distilled water contain hydrogen and oxygen, therefore they are both pure substances,

it should have an internal chamber and two thermometers sticking out of the top. the internal chamber will also be closed off from the outside.

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.