6. Each column of the periodic table is

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1 1. Atoms of elements that are in the same group have the same number of 5. Mendeleev left gaps in his periodic table because A. Protons B. Valence Electrons A. the table was too full B. no known elements fit there. 2. Which of the following elements is an alkali metal? 6. Each column of the periodic table is A. Sodium B. Calcium A. a group B. a period 3. Semiconductors are elements that A. do not form compounds. B. can conduct heat and electricity under certain conditions. 7. The periodic law states that elements that have similar properties appear A. at every tenth element B. at regular intervals. 4. Carbon and other nonmetals are found in which area of the periodic table? A. On the right side B. On the left side 8. Elements that belong to the same group have the same number of A. neutral electrons B. valence

2 9. Atoms that gain or lose electrons are called A. isotopes B. ions 13. Most elements on the left side of the periodic table are A. nonmetals B. metals 10. Elements that have one valence electron tend to 14. Each element in an element family shares the same A. be highly reactive B. not react A. number of valence electrons B. atomic number 11. The three main groups of elements are metals, nonmetals, and 15. Elements in an element family have similar A. alkali metals B. semiconductors A. atomic weights B. chemical properties 12. Most elements are A. metals B. nonmetals 16. How do you know that potassium, an alkali metal, is highly reactive? A. It has one valence electron B. It conducts heat

3 17. Which of the following is not true of noble gases? A. They exist as single atoms. B. They are highly reactive. 21. Metals tend to be A. gases B. good conductors of heat. 18. Elements within the same group in the periodic table have similar properties because they have the same number of A. valence electrons B. protons 22. Which is not a family of the periodic table? A. anions B. noble gases 19. Elements that share properties of both metals and nonmetals are called 23. Alkali metals are extremely reactive because they A. ions B. semiconductors. A. have very small atomic masses. B. have one valence electron 20. Which statement about the alkali metals is correct? A. They are located in the left-most column of the periodic table. B. They are usually gases. 24. Most halogens form compounds by A. gaining an electron to form a negative ion B. losing protons

4 25. A compound differs from a mixture because it A. always remains frozen B. is held together by chemical bonds. 29. In which type of bond do atoms share electrons? A. ionic bonds B. covalent bonds 26. Often atoms join so that each atom will have A. an outer most energy level that is full of B. an equal number of protons and 30. A carbon atom can bond to four other atoms because it has A. four valence electrons B. no protons in its nucleus. 27. The bonds that hold atoms together behave most like 31. Atoms and ions are held together by A. glue B. flexible springs. A. nuclear bonds B. chemical bonds. 28. An ionic bond is a bond that forms between A. ions with opposite charges B. atoms with neutral charges. 32. Which of the following models could be used to compare the sizes of atoms in a molecule? A. space filling B. ball-and-stick

5 33. Which of the following models would show the bond angle? 37. The forces that hold different atoms or ions together are A. Space filling B. Ball-and-Stick A. electric currents B. chemical bonds 34. Atoms sometimes form bonds to A. become more stable B. lose energy 38. The order of elements in the periodic table is based on the number of in the nucleus. A. Protons B. electrons 35. A compound is held together by A. gravity B. chemical bonds 39. Neon is an inert gas because its outer is full of A. nucleus B. energy level 36. Atoms often join so that each atom will have A. and outermost energy level that is full of B. an equal number of protons and 40. Group 17 halogens form compounds by gaining an electron to become. A. negative ions B. positive ions

6 41. One of the important ideas about Mendeleev s periodic table was that he predicted new. A. compounds B. elements 45. Elements that are usually shiny are. A. nonmetals B. metals 42. The periodic law states that, in the modern periodic table, elements with similar appear at regular intervals. a. chemical properties B. masses 46. Elements that have properties of both metals and nonmetals A. Semiconductors B. earth metals 43. A group s elements react similarly because of their. A. nucleus B. valence electrons 47. Highly reactive elements of Group 17 that are poor conductors A. alkali metals B. Halogens 44. Some elements are highly because their outermost energy levels are only partially filled. A. reactive B. nonreactive 48. highly reactive elements that belong to Group 1 A. Alkali metals B. Alkali earth metals

7 49. elements that belong to Groups 3-12 and are somewhat reactive 50. Group 2 elements that have two valence electrons A. halogens B. transition metals A. alkali earth metals B. Alkali metals

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