Answer:
For example, the atomic mass of chlorine (Cl) is 35.45 amu because chlorine is composed of several isotopes, some (the majority) with an atomic mass of 35 amu (17 protons and 18 neutrons) and some with an atomic mass of 37 amu (17 protons and 20 neutrons).
Hope it helped!!!
I can’t answer 7 because I can’t read the writing on the papers in the image. But for 8, it is important to classify living things because it makes it easier to study and understand the behaviors, lives, and the evolutionary progression of millions of life forms
A. cyanobacteria is the answer!
