This is a governmental agency whose mission is to protect human health and the environment.

Which of the following particles always has a positive charge? a. electronb. neutron c. proton d. ion

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

Fungi are classified into how many groups? a. 1 group b. 2 groups c. 3 groups d. 4 groups