What happens during nuclear fission? A. A nucleus gives off a positron.
B. Two nuclei give off alpha particles.
C. Two nuclei join to form a larger nucleus.
D. A nucleus splits to form two or more smaller nuclei.

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