4 5 6Letter only 9.What observations in the gold foil experiment made Rutherford conclude thatatoms are mostly empty space?A. Some alpha particles were deflected at smaller angles.B. Most alpha particles passed through the gold foil undeflected.C. Few alpha particles deflected almost back towards the source.D. Very few particles were deflected from their path, indicating that thepositive charge of the atom occupies very large space.10. What conclusion did Rutherford's gold foil experiment lead to? A. Atoms areindivisible.B. Neutrons are located in the nucleus.C. Atoms contain a positively charged nucleus.D. Electrons move in definite energy levels called shells.11. Which of the following statements concerning subatomic particles is correct?A. Three fundamental types exist, all of which are charged.B. Three fundamental types exist, one of which is charged.C. Three fundamental types exist, two of which are charged.D. Three fundamental types exist, none of which are charged.12. One isotope of oxygen has the atomic number 8 and the mass number 18.An atom of this isotope containsA. 8 protonsB. 8 neutronsC. 9 neutronsD. 18 electrons13. Element A has a mass number of 100 while element B has an atomic numberof 118. What will be the number of electrons of element B?A. 59В. 60С. 118D. 12014. How many protons, neutrons and electrons are in the neutral atom of 35,C1?A. 17 protons, 15 neutrons and 17 electrons B.17 protons, 17 neutrons and 17 electrons C. 17.protons, 17 neutrons and 18 electronsD. 17 protons, 18 neutrons and 17 electrons15. Which of the following statements CORRECTLY describes atoms, ions andisotopes?I.Neutral atom has equal number of protons, neutrons and electrons.II. Atoms are the smallest particles of matter that retain the characteristicsof an element.III. Isotopes are atoms of the same element with unequal number ofneutrons in the nucleus.IV. Ions are atoms with unequal number of protons and electrons and areformed when an atom loses or gains electrons.29co Q3_Science 8_ Module 3A. 1, II and IIIB. II, III and IVC. I, III and IVD. 1, II, III and IV

9. What observations in the gold foil experiment made Rutherford conclude that atoms are mostly empty space? A. Some alpha particles were deflected at smaller angles. B. Most alpha particles passed through the gold foil undeflected. C. Few alpha particles deflected almost back towards the source. D. Very few particles were deflected from their path, indicating that the positive charge of the atom occupies very large space.

9. What observations in the gold foil experiment made Rutherford conclude that atoms are mostly empty space? A. Some alpha particles were deflected at smaller angles. B. Most alpha particles passed through the gold foil undeflected. C. Few alpha particles deflected almost back towards the source. D. Very few particles were deflected from their path, indicating that the positive charge of the atom occupies very large space.