You are at the beach, counting the waves as they hit the shore. In 2 minutes you count 15 waves. What is the period and frequency of these waves?

You are working in the lab and are working with the same element but with varying isotopes of the element. you are working with c-11, c-13, c-14, and c-15. what is the average atomic mass of this element? (use periodic table) a- 12 b-15 c-14 d-13