If i blow up a ballon, tie it off, and release it, it will fall to the floor, why does it fall instead of float

The balloon would fall because carbon dioxide, the gas you exhale and blew up with, is denser than air and therefore will fall. Helium however, is less dense than air and floats.

hope this helps :)

it's c. elements are placed in rows based on how may valencies electrons have.

your answer would be “dry”