Question 10 (3 points)
study these diagrams. the dots represent valence electrons orbiting the nucleus of
an atom. which diagram shows the valence electron pattern for a carbon atom?

In photo below

Explanation:

I got it correct in my test :)

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.