Question

protons: 16
neutrons: 17
electrons: 16
33
s
16
sulfur

Explanation:

Step1: Recall the formula for mass number

The mass number ($A$) of an atom is the sum of the number of protons and neutrons. The formula is $A = \text{number of protons} + \text{number of neutrons}$.

Step2: Substitute the given values

We know the number of protons is 16 and the number of neutrons is 17. So, $A = 16 + 17$.

Step3: Calculate the sum

$16 + 17 = 33$.

Answer:

The mass number of this sulfur atom is 33.