As the number of protons and neutrons in the nucleus increases, elements are much less likely to form stable, non-radioactive isotopes. of elements that form non-radioactive isotopes, which has the highest atomic number?

8 carbon atoms forming single bonds with 18 hydrogen atoms; a triple bond exists between the third and fourth carbon atom from the right

explanation:

smooth muscle is composed of involuntary muscles found within the walls of organs and structures such as the esophagus, stomach, intestines, and blood vessels. those muscles push materials like food or blood through organs. unlike skeletal muscle, smooth muscle can never be under your control.