Which symbol represents atoms that are isotopes of an element? a. C-14 and N-14

b. O-16 and O-18

c. I-131 and I-131

d. Rn-222 and Ra-222

Which statement is the best summary of the model? a-a series of aerobic and anaerobic reactions take place in cells b- the sun's energy moves through trophic levels in a food chain c-light energy is converted into stored chemical energy plants.d- food molecules are broken down in the cells if living things.

This connective tissue consists of large round densely packed cells with the nucleus pushed to one side.

Which statements best describe the atoms of the gas neon? check all that apply