toward the positive plate, this indicated that the beam had a ________________ charge. 23. Therefore a cathode ray is made of a beam of ____________________. 24. used a radioactive sample and determined that natural radiation has ______ components: alpha particles which have a _______ charge and a relatively _______________ mass, ________________ particles which have a negative charge and a mass of ______ and ________________ rays which are neutral and have ________ mass. 25. used alpha particles in his experiment. Because the alpha particles are relatively Gold Foil large and positive the fact that most of them proceeded straight through the foil proved that the atom is mostly _______________ ______________. Some of the positive alpha particles deflected directly back toward the source which indicated that the nucleus was __________________ charged Thus, Rutherford is credited with discovering the ________________. 26. Draw a simple sketch of each of the atom. Indicate charge where needed. chemist’s model Thomson Bohr Modern Model
toward the positive plate, this indicated that the beam had a ________________ charge. 23. Therefore a cathode ray is made of a beam of ____________________. 24. used a radioactive sample and determined that natural radiation has ______ components: alpha particles which have a _______ charge and a relatively _______________ mass, ________________ particles which have a negative charge and a mass of ______ and ________________ rays which are neutral and have ________ mass. 25. used alpha particles in his Gold Foil experiment. Because the alpha particles are relatively large and positive the fact that most of them proceeded straight through the foil proved that the atom is mostly _______________ ______________. Some of the positive alpha particles deflected directly back toward the source which indicated that the nucleus was __________________ charged Thus, Rutherford is credited with discovering the ________________. 26. Draw a simple sketch of each chemist’s model of the atom. Indicate charge where needed. Thomson Bohr Modern Model