Aball is thrown horizontally from the top of a building 22.3 m high. the ball strikes the ground at a point 127 m from the base of the building. the acceleration of gravity is 9.8 m/s^2 . find the time the ball is in motion. answer in units of s.

Elements in group viiia (also known as group 18, or the noble gases) have similar properties because they all have a. the same number of electron shells b. full octets c. the same number of valence electrons d. the same number of electrons needed to fill their octet