I believe the answer is the second one.
D, all notebooks would hit the floor at the same time. The time it takes to hit the floor is independent of their weight, but rather dependent on the acceleration of gravity. Since gravity is constant, they will all hit the floor at the same time.
Yes, for balance.hope this helped.
Non metals are all the way on the right side
Metalloids are the stair case
Metals are on the left side
