1. Atoms of elements that are in the same 5. Mendeleev left gaps in his periodic table group have the same number of because
A. Protons A. the table was too full
B. Valence Electrons B. no known elements fit there.
2. Which of the following elements is an 6. Each column of the periodic table is alkali metal?
A. Sodium A. a group
3. Semiconductors are elements that 7. The periodic law states that elements that have similar properties appear A. do not form compounds. A. at every tenth element B. can conduct heat and electricity under certain conditions. B. at regular intervals.
4. Carbon and other nonmetals are found in 8. Elements that belong to the same group which area of the periodic table? have the same number of
A. On the right side A. neutral electrons
B. On the left side B. valence electrons.
9. Atoms that gain or lose electrons are called 13. Most elements on the left side of the periodic table are
A. isotopes A. nonmetals
10. Elements that have one valence electron 14. Each element in an element family shares tend to the same
A. be highly reactive A. number of valence electrons
B. not react B. atomic number
11. The three main groups of elements are 15. Elements in an element family have metals, nonmetals, and similar
A. alkali metals A. atomic weights
B. semiconductors B. chemical properties
12. Most elements are 16. How do you know that potassium, an alkali metal, is highly reactive?
A. metals A. It has one valence electron
B. nonmetals B. It conducts heat
17. Which of the following is not true of 21. Metals tend to be noble gases?
A. They exist as single atoms. A. gases
B. They are highly reactive. B. good conductors of heat.
18. Elements within the same group in the 22. Which is not a family of the periodic periodic table have similar properties because table? they have the same number of
A. valence electrons A. anions
B. protons B. noble gases
19. Elements that share properties of both 23. Alkali metals are extremely reactive metals and nonmetals are called because they
A. ions A. have very small atomic masses.
B. semiconductors. B. have one valence electron
20. Which statement about the alkali metals 24. Most halogens form compounds by is correct?
A. They are located in the left-most column A. gaining an electron to form a negative ion of the periodic table.
B. They are usually gases. B. losing protons
25. A compound differs from a mixture 29. In which type of bond do atoms share because it electrons?
A. ionic bonds A. always remains frozen B. covalent bonds B. is held together by chemical bonds.
26. Often atoms join so that each atom will 30. A carbon atom can bond to four other have atoms because it has
A. an outer most energy level that is full of A. four valence electrons electrons. B. no protons in its nucleus. B. an equal number of protons and electrons.
27. The bonds that hold atoms together 31. Atoms and ions are held together by behave most like
A. nuclear bonds A. glue
B. chemical bonds. B. flexible springs.
28. An ionic bond is a bond that forms 32. Which of the following models could be between used to compare the sizes of atoms in a molecule? A. ions with opposite charges A. space filling B. atoms with neutral charges. B. ball-and-stick
33. Which of the following models would 37. The forces that hold different atoms or show the bond angle? ions together are
A. Space filling A. electric currents
B. Ball-and-Stick B. chemical bonds
34. Atoms sometimes form bonds to 38. The order of elements in the periodic table is based on the number of A. become more stable ______in the nucleus.
A. Protons B. lose energy B. electrons
35. A compound is held together by 39. Neon is an inert gas because its outer ______is full of A. gravity electrons.
B. chemical bonds A. nucleus
B. energy level
36. Atoms often join so that each atom will 40. Group 17 halogens form compounds by have gaining an electron to become ______. A. and outermost energy level that is full of electrons. A. negative ions B. an equal number of protons and electrons. B. positive ions
41. One of the important ideas about 45. Elements that are usually shiny are Mendeleev’s periodic table was that he ______. predicted new ______.
A. nonmetals A. compounds B. metals B. elements
42. The periodic law states that, in the 46. Elements that have properties of both modern periodic table, elements with similar metals and nonmetals ______appear at regular intervals. A. Semiconductors a. chemical properties B. earth metals B. masses
43. A group’s elements react similarly 47. Highly reactive elements of Group 17 because of their that are poor conductors ______.
A. alkali metals A. nucleus B. Halogens B. valence electrons
44. Some elements are highly 48. highly reactive elements that belong to ______because their Group 1 outermost energy levels are only partially filled. A. Alkali metals A. reactive B. Alkali earth metals B. nonreactive
49. elements that belong to Groups 3-12 and 50. Group 2 elements that have two valence are somewhat reactive electrons
A. halogens A. alkali earth metals
B. transition metals B. Alkali metals