<span>Find an activity you enjoy and make it a priority in your schedule.</span>
Answer:
I believe that its B my apologies if its wrong/
Explanation:
Sodium (Na) is very reactive because it does not have a full valence shell.
Gravity increased the downward speed (or decreases the upward speed) by 9.8 m/s every second.
21.2/9.8 = 2.2 seconds