S2-, sulfur ion Protons: Electrons:

The protons and electrons in each element are equal. The sulfur has 16 electrons and 16 protons. But the ionic atom’s electron quantity changes depending on how many it has gained. 'S2-' has gained 2 electrons, which means it has now 18 electrons and 16 protons.

what's the question ?

the most common type of reef is the fringing reef. this type of reef grows seaward directly from the shore. they form borders along the shoreline and surrounding islands.