1=c 2=a 3=b
i hope these answer your questions
The correct answer among the choices given is option B. Radioisotopes are isotopes that emit radiation because they have unstable nuclei. These are radioactive isotopes of an element. They are defined as atoms that contain an unstable combination of neutrons and protons.
Answer: Between the alveoli and a network of tiny blood vessels called capillaries, which are located in the walls of the alveoli.
3.gases- <span> Their molecules are already the farthest apart compared with solids and liquids, and small changes in temperature causes these loose molecules.</span>
The answer would be b) GAS
