Explain the difference between a cation and an anion and give an example of each

Cations are positively charged and have more protons than electrons.

Anion is negatively charged and have more electrons that protons.

Cations examples: Hydronium is H3O+, Silver is Ag+

Anion examples: Sulfate anion is SO42-

Hope this helps.

before it leaves the nucleus of a eukaryotic cell, mrna is altered in the following ways: - a cap is added to the 5' end of the mrna molecule; - a poly a tail is added to the 3' end; - introns are removed and exons are spliced together.

there are so many examples for that in different areas, like biology experiment carried out in our lab recently.

here's one link: