List two major characteristics of elements

All elements have certain characteristics that are summarized on the periodic table. These characteristics include the element's symbol, atomic number, and atomic mass. You will learn how the number of protons in an atom relates to an element's atomic number, and explore how isotopes affect the atomic mass.

kelp are large brown algae that live in cool, relatively shallow waters close to the shore. they grow in dense groupings much like a forest on land. these underwater towers of kelp provide food and shelter for thousands of fish, invertebrates, and marine mammal species.

e) all of the above