Arrange the isotopes of sulfur and phosphorus in order of decreasing number of neutrons. rank the isotopes from most to fewest neutrons. to rank items as equivalent, overlap them.

Rank of the isotopes from most to fewest neutrons:

S-36, P-35

P-33

P-32

S-32, P-31

Explanation:

The following options are missing:

S-36

P-35

S-32

P-33

P-32

P-31

Sulfur has 16 protons then S-36  has 36 - 16 = 20 neutrons and S-32 has 32 - 16 = 16 neutrons.

Phosphorus has 15 protons, then  P-35 has 35 - 15 = 20 neutrons,  P-33 has 33 - 15 = 18 neutrons,  P-32 has 32 - 15 = 17 neutrons and P-31 has 31 - 15 = 16 neutrons.