Is sulphur isotope??

The most common sulfur atoms have a mass number of 32 and account for about 95% of the naturally-occurring sulfur atoms. There are 3 other naturally-occurring stable isotopes with mass numbers of 33, 34 and 36 that make up the other 5% of sulfur atoms. Other isotopes of sulfur have been created. One of the most important in research is sulfur-35.

All atoms having 16 protons are sulphur atoms.

In nature, sulphur has 4 stable isotopes, namely sulphur-32, sulphur-33, sulphur-34 and sulphur-36. The isotopes have 16, 17, 18 and 20 neutrons respectively.