GENERAL CHEMISTRY

The atomic number of sulfur is 16. So each sulfur will always contain 16 protons.
The atomic number of phosphorous is 15. So each sulfur will always contain 15 protons.
S-36: 36=total amount of protons and neutrons. 36-16=20 neutrons
P-35: 35-15 = 20 Neutrons
S-32: 32-16=16 neutrons
P-33: 33-15=18neutrons
P-32: 32-15 = 17neutrons
P-31: 31-15 = 16neutrons
Ranking: S-36, P-35, P-33, P-32, S-32, P-31

S-36 = P-35 > P-33 > P-32 > S-32=P-31

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P-36>P-35>p-34>P-33>P>32>p-31>

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The number after the elemental symbol is the total number of protons and neutrons in the nucleus.

The # protons of an element will always stay the same no matter what the isotope is. As well, the # of protons present is equal to the atomic number of theelement.

For example, the atomic number of chlorine is 17. So there will always be 17 protons in a chlorine atom.

Cl-37. This means the number of protons and neutrons is equal to 37. We know there's 17 protons in each chlorine, so that leaves us with 20 neutrons.(37-17=20)
Cl-35 : Do the same thing. 35-17=18 neutrons

The atomic number of sulfur is 16. So each sulfur will always contain 16 protons.
S-36: 36=total amount of protons and neutrons. 36-16=20 neutrons
S-33: 33-16=17 neutrons
S-34: 34-16=18neutrons
S-32: 32-16=16neutrons

So putting these in order:
Cl-37; S-36 (20 neutrons)
S-34; Cl-35 (18 neutrons)
S-33 (17 neutrons)
S-32 (16 neutrons)

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