<h2><em><u>B</u></em></h2>
boi what class are you in
Answer:
Design A average is 18.666 and Design B average is 32.
Explanation:
Add each of the trial numbers for each design. Divide those numbers by 3 for each design to get 18.666 for Design A and 32 for Design B.
The noble gases already have a full outer shell. The noble gases break the trend by being less reactive than the elements to their left.