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.

the darker peppered moth species were favored due to the fact that the industrial revolution had made all the nearby trees a darker color instead of white.

because they are eaten by the frog and the frog getseaten by the snake and the snake by the eagle