A carbon atom has 6 protons and 6 electrons. Carbon has three naturally occurring isotopes, carbon- 12, carbon-13, and carbon-14. Which of these statements is true about carbon and its isotopes?

idk

explanation:

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.