TEST NAME:Atoms, Elements, and the Periodic Table Unit Assessment (2016) TEST ID:36063 GRADE:06-08 SUBJECT:Life and Physical Sciences TEST CATEGORY: Common Assessment Atoms, Elements, and the Periodic Table Unit Assessment (2016) Page 1 of 13
10/03/16, Atoms, Elements, and the Periodic Table Unit Assessment (2016) Student: Class: Date: Instructions Read each selection. Choose the best answer. 1. Which scientist was the first to develop the rules of chemical reactions that are explained by modern atomic theory? A. John Dalton B. Isaac Newton C. Galileo Galilei D. Albert Einstein 2. In 1909, scientist Ernest Rutherford directed a stream of high speed alpha particles at a thin piece of gold foil. Some of the particles passed through, some were deflected, and some bounced straight back. This result caused Rutherford to conclude that A. gold atoms have a solid nucleus. B. gold atoms can conduct electricity. C. gold atoms are denser than other metals. D. gold s electrons orbit the nucleus at definite distances from the center. 3. Based on the experiment conducted by Dalton, which model best supports his concept of the atom? A. Fixed orbital model B. Blueberry model C. Electron cloud model D. Bowling ball model 4. One of the more important differences between the modern model of the atom and Bohr's model of the atom is that the electrons in the modern model are. A. moving in fixed orbits around the nucleus B. moving in an electron cloud C. moving in a random motion around the nucleus D. not moving Atoms, Elements, and the Periodic Table Unit Assessment (2016) Page 2 of 13
5. In the plum pudding model, the "plums" represent the. A. neutrons B. protons C. nucleus D. electrons 6. Which statement explains why most of the mass of an atom is contained in the relatively small nucleus? A. Atoms are composed of less dense subunits than the nucleus. B. Protons and neutrons have more mass than electrons. C. The nucleus is located at the center of an atom. D. Atoms are composed of mostly empty space. 7. Which is electrically attracted to positively-charged particles in an atom? A. neutrons B. electrons C. protons D. nucleus 8. An atom of tin has an atomic number of 50 and a mass number of 119. How many protons, electrons, and neutrons are found in one neutral atom of tin? A. 50 protons, 69 electrons, 50 neutrons B. 50 protons, 50 electrons, 69 neutrons C. 69 protons, 50 electrons, 69 neutrons D. 69 protons, 69 electrons, 50 neutrons 9. When a neutral atom gains or loses electrons, it becomes A. more stable. B. an isotope. C. an ion. D. less charged. 10. The element sodium, Na, has an atomic number of 11 and an atomic mass of 23.0 atomic mass units (amu). Which of these elements is most likely to have similar chemical reactivity as sodium? A. neon, Ne, which has a similar symbol B. magnesium, Mg, which has an atomic mass of 24.3 amu C. aluminum, Al, which is in the same period on the periodic table D. potassium, K, which is in the same group on the periodic table Atoms, Elements, and the Periodic Table Unit Assessment (2016) Page 3 of 13
11. The identifying characteristic of an element is its number of A. protons. B. neutrons. C. electrons. D. orbitals. 12. How many atoms are in one formula unit of magnesium hydroxide, A. 6 B. 5 C. 4 D. 3 13. Where are the most reactive metals located on the periodic table? A. the uppermost complete row of the table B. the rows at the bottom of the table connecting two section C. the column at the far left side of the table D. the second column from the right side of the table Atoms, Elements, and the Periodic Table Unit Assessment (2016) Page 4 of 13
14. A partial periodic table is shown. Using the partial periodic table, which statement is correct? A. Oxygen (O) has more protons than chlorine (Cl). B. Iron (Fe) has more protons than silver (Ag). C. Sodium (Na) has more protons than carbon (C). D. Hydrogen (H) has more protons than helium (He). Atoms, Elements, and the Periodic Table Unit Assessment (2016) Page 5 of 13
15. A partial periodic table of elements is shown. Which group contains the noble gases? A. 1 (1A) B. 2 (2A) C. 17 (7A) D. 18 (8A) 16. Sodium, Na, is in the same group as A. Ne. B. Mg. C. Ca. D. K. 17. A certain atom has 20 electrons, 21 neutrons, and 20 protons. What is the atomic mass of the atom? A. 20 B. 21 C. 41 D. 61 Atoms, Elements, and the Periodic Table Unit Assessment (2016) Page 6 of 13
18. The table shows some characteristics of a few atoms. Atomic Particles Element Atomic Number Number of? Mass Carbon (C) 6 6 12 Chromium (Cr) 24 28 52 Magnesium (Mg) 12 12 24 Sodium (Na) 11 12 23 The mass of an element is the sum of the atomic number and the number of A. electrons. B. ions. C. neutrons. D. protons. 19. Elements are organized on the periodic table according to A. electronegativity values. B. atomic mass. C. atomic number. D. the number of neutrons. 20. Based on the periodic table, how many protons are found in an atom of iron (Fe)? A. 8 B. 26 C. 30 D. 56 21. Based on the Periodic Table of the Elements, which of these elements has properties most similar to calcium (Ca)? A. carbon (C) B. barium (Ba) C. sodium (Na) D. manganese (Mn) Atoms, Elements, and the Periodic Table Unit Assessment (2016) Page 7 of 13
22. The symbols W, X, Y, and Z represent four elements shown on the outline of a periodic table. Which element is classified as a metal? A. W B. X C. Y D. Z 23. The outline of a partial periodic table is shown. Zinc is a metal. In which section of the partial periodic table is zinc located? A. Section 1 B. Section 2 C. Section 3 D. Section 4 Atoms, Elements, and the Periodic Table Unit Assessment (2016) Page 8 of 13
24. In which pair of elements are both metalloids? A. Sn and Sb B. Sb and Te C. Te and I D. I and Xe 25. The MAJORITY of the elements found on the Periodic Table of the Elements are A. gases. B. metals. C. liquids. D. nonmetals. 26. All of these elements are metals except A. gold. B. helium. C. sodium. D. aluminum. 27. The dot structure for the element sodium is shown. Na Which of these describes the electron behavior necessary for sodium to bond with another element? A. Sodium will lose 1 electron and form an ion. B. Sodium will gain 7 electrons and form an ion. C. Sodium will share 1 electron in a covalent bond. D. Sodium will share 7 electrons in a covalent bond. 28. The formation of an ionic bond involves the A. transfer of electrons. B. sharing of neutrons. C. transfer of neutrons. D. sharing of protons. Atoms, Elements, and the Periodic Table Unit Assessment (2016) Page 9 of 13
29. Which statement best describes how potassium bonds with bromine? A. Potassium will share 7 electrons with bromine. B. Potassium will donate an electron to bromine. C. Bromine will donate an electron to potassium. D. Bromine will donate 7 electrons to potassium. 30. This is an example of a(n) bond: A. Ionic B. Covalent C. Double D. Iron Atoms, Elements, and the Periodic Table Unit Assessment (2016) Page 10 of 13
31. Which of these would be the best way to prove that a pine stick is more flexible than an oak stick? A. A B. B C. C D. D Atoms, Elements, and the Periodic Table Unit Assessment (2016) Page 11 of 13
32. A scientist burning sulfur repeatedly observes the following reaction: Which conclusion should the scientist draw? A. This reaction will always occur if it takes place under identical conditions. B. Given enough time, the sulfur dioxide will become sulfur and oxygen. C. Any atom coming into contact with an oxygen molecule will bond with it. D. Any number of possible reactions could occur given the same variables. 33. A student has repeatedly performed controlled experiments to obtain data. The student s hypothesis is supported by the data from the experiments. What would be the next step for the student? A. form a theory B. draw a conclusion C. perform more experiments D. revise the hypothesis 34. The average distance between Earth and the Sun is 149,600,000 kilometers. Which of the following is the correct scientific notation for this distance? A. B. C. D. Atoms, Elements, and the Periodic Table Unit Assessment (2016) Page 12 of 13
35. The models of atoms have changed over two centuries. Drag and drop the correct scientist and model name into the correct year of historical development. Bohr Thomson Dalton 1808 1897 1911 1913 1920s to Present Atoms, Elements, and the Periodic Table Unit Assessment (2016) Page 13 of 13