What is the Atomic Mass of Sulfur?

Atomic Mass of Sulfur is .

A) 32

B) 30

C) 31

D) 33

Answer: The atomic mass of Sulfur is 32. Therefore, the correct option is A.

Explanation:

The Atomic Mass of any substance is the sum of the number of protons and the number of neutrons in the nucleus of that atom.

For Sulfur,

• Number of Protons = 16
• Number of Neutrons = 16

Thus,

Atomic Mass of Sulfur = Number of Protons + Number of Neutrons 
                                    = 16 + 16 = 32

In absolute terms, the average atomic mass of Sulfur is 32.065 amu. It is calculated taking into account all the isotopes of Sulfur.

The stable isotopes of Sulfur are,

• ³²S
• ³³S
• ³⁴S
• ³⁶S

Out of all these isotopes, about 95% of the sulphur is in ³²S.