A student drops a ball off the top of building and records that the ball takes 3.49s to reach the ground. Determine all unknowns and answer the following questions. Neglect drag. What was the ball's speed just before striking the ground?

Match each vocabulary term to its definition. 1. electrons neutral subatomic particles found in the nucleus of the atom 2. neutron lowest energy position of an electron in an atom 3. photon the path of an electron around the nucleus of an atom 4. ground state negatively charged, subatomic particles 5. protons packet of energy of specific size 6. element substance with only one type of atom 7. orbital positively charged, subatomic particles found in the nucleus of the atom